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Logos

Table of Contents


Logo Images

Table 3 below shows a number of logo images extracted from tool photographs, trademark filings, or published sources. In some cases these are also registered trademarks (as noted in the table), but in general the logos are simply informal marks chosen by the manufacturer to identify their tools.

The "Shorthand" column shows the names we've assigned for convenience of reference, which have been chosen carefully to allow the logo images to be found easily using an index search. Most logos consist of one or more letters in a geometric outline or other recognizable shape, and our naming convention tags the image with XYZ-Outline, where "XYZ" are the observed letters, and Outline is the enclosing shape. (If there's no obvious outline, we have appended "-Logo" to the letters.)

The "Company" column will generally identify the company using the logo and link to our article for the company. Logos for unknown forge-marks or tools from unknown makers will point to a section where we've gathered whatever information is available.

In a few cases "Multiple Uses" will appear instead of a specific company name, indicating that the same (or nearly identical) logo was used by multiple companies. For these cases the site index under "Logo Images" will have links to the "Tool Identification" sections of the companies known to use the mark.

Certain logos are identified in the table as "Forge Marks", meaning that they appear as a raised symbol on a forged piece, having been incised into the forging die. These marks were often used on contract manufacturing production to identify the maker.

Our intention is that this table of logo images (along with the tables of trademarks and brands) should be sufficient to identify the tools made by any of the companies noted on this site, within the scope of our coverage. If any of our readers have found additional logos that should be added, please let us know via email.

Tips for Searching

If you're trying to identify an unknown logo, it may be faster to use an index search rather than looking through all of the images. Try entering the observed letters followed by a dash and the outline shape in the search box. (Popular outlines are Triangle, Diamond, Hex, Oval, and Circle, plus Shield and Horseshoe.)

If you're not sure of the order of the letters, a search for the outline shape followed by "image" will show all logos with that outline. For example, searching for "circle image" will show all of the logos with text in a circle.

Table 3. Tool Logos with Images by Company

Image Shorthand Company Reg TM? Forge Mark? Notes
5-5-Circle AIGO Kōgyō Yes Japanese trademark stamped on tools
ACCo-Triangle American Chain Co. Stamped on tools
A-Triangle Armstrong Bros. Tool Yes Used on early tools and contract production
Strong-Arm Armstrong Bros. Tool Yes Registered trademark
ASH-Hex Asahi Kinzoku Kōgyō Yes Yes Japanese trademark typically forged into tools
A-Horseshoe Atha Tool Co. Typically stamped on tools
A-Circle Ayer, F.H. Manufacturing Stamped marking on sockets
B-Diamond Barnes Tool Co. Yes Registered trademark
BC-Circle Bemis & Call Yes Registered trademark
B-Triangle Billings & Spencer Yes Yes Registered trademark and forge mark
Arrowhead Blackhawk Mfg. Yes Stamped on early tools
B-Circle Bonney Forge & Tool Used on contract production
B-Hex Bonney Forge & Tool Used on Bon-E-Con tools
B-Shield Bonney Forge & Tool Yes Forge mark used on earlier tools
CV-Circle Bonney Forge & Tool Indicates Chrome-Vanadium alloy steel
BMCo-Oval Braunsdorf-Mueller Co. Yes Registered trademark
BHM-Logo Bridgeport Hardware Mfg. Appears on contract-manufactured tools
X-Logo Bridgeport Hardware Mfg. “X” in center of wrench handles, from patent D97325
Swastika Buffum Tool Co. Yes Registered trademark
CT-Logo California Tool Co. Stamped on sockets
CAT-Circle Cape Ann Tool Company Yes Forge mark on early Walden universal
Anvil-Logo Champion DeArment Yes Registered trademark
CH-Logo Cleveland Hdwe. & Forging Yes Yes Forge or foundry mark on tools
C-Circle Cornwell Quality Tools Yes Registered trademark
C-Wedge Council Tool Stamped mark on tools
CTCo-Logo Crescent Tool Co. Yes Registered trademark
DTM-Hex D.T.M. Corporation Stamped marking “DTM” in hex outline
Diamond-Horseshoe Diamond Calk Horseshoe Yes Yes Registered trademark and forge mark
D-Diamond Dunbar Drop Forge Co. Yes Yes Registered trademark and forge mark
D-Trapezoid Duro Metal Products Stylized “D” used on early Duro sockets
X-Circle Duro Metal Products Stylized “DC” denoting Duro-Chrome
Guaranteed-Logo Erie Tool Works Yes Text "Guaranteed" in recessed panel
FTF-Triangle Fairmount Tool & Forging Yes Yes Stamped or forged
G-Diamond Gendron Iron Wheel Co. Stamped on tools
GTD-Logo Greenfield Tap & Die Yes Yes Stamped or forged
HP-Shield H-P Tool Mfg. Marked on wrenches with “Blue Line”
H-Shield Hall, Charles E. Co. “H” in a shield
HT-Circle Harris-Thomas Drop Forge Yes Found on Cornwell No. 55 ratchet
CFT-Oval Herbrand Corp. Found on pliers and wrenches.
H-Diamond Herbrand Corp. Yes Yes Stamped on or forged into tools
Round-H-Circle Hinsdale Mfg. Yes Embedded in “Hinsdale” trademark
DIF-Square Interstate Drop Forge Yes Forge mark on contract production
JIS-Circle Japanese Industrial Standards Text "JIS" in a circle; forged or stamped
Lineman-Circle Klein, M. & Sons Yes Climbing lineman logo, stamped on tools
K-Diamond Kraeuter & Co. Appears on older open-end and “S” wrenches
KTC-Double-Circle Kyoto Tool Co. (KTC) "Nijūmarukyo" (二重丸京) logo, forged or stamped
KTC-Oval Kyoto Tool Co. (KTC) Yes Forged or stamped
L-Keystone Lakeside Forge Co. Yes Used as a forge mark; sometimes stamped
L-Hex Larson Tool & Stamping Stamped on tools and sockets
Lobster-Logo Lobtex Company Yes Typically forged into tools
PL-Diamond Lowentraut, P. Mfg. Stamped on tools
US-Diamond Lowentraut, P. Mfg. Stamped on tools
MH-Circle McKaig-Hatch Yes Stamped or forge mark
3-Blocks Miki Netsuren Yes Forge mark on wrenches
MW-Oval Montgomery Ward & Co. Stamped on tools
M-Circle Moore Drop Forging Yes Yes Registered trademark and forge mark
M-Diamond Mossberg, Frank Co. Yes Registered trademark
H-Circle Multiple Uses Used by Craftsman, New Britain Machine, and others
MM-Oval Mystery Tool Found on a triple-open wrench
NB-Circle New Britain Machine Yes Registered trademark
T-Circle Osaka Tankō Yes Forge mark on “OSAKA TANKO” wrenches
OT-Circle Oswego Tool Co. “T” Inside an “O”
OTC-Shield Owatonna Tool Co. Yes Registered trademark
PC-Hex P&C Hand Forged Tool Yes Stamped on tools
PS-Oval Page-Storms Drop Forge Stamped on tools
Pexto-Oval Peck, Stow & Wilcox Yes Registered trademark
RI-Circle Rhode Island Tool Yes Forge mark noted on open-end wrenches
RK-Circle Riken Kaki Kōgyō Yes
3-Ki-Circle Sanjō Kikai Yes Forge mark on tool
AZ-Circle Sears, Roebuck & Co. Craftsman mfg. code for J.H. Williams
Dunlap-Oval Sears, Roebuck & Co. Yes Registered trademark, stamped or forged
No Image
 I-Circle Sears, Roebuck & Co. Craftsman mfg. code for Parker Mfg.
K-Circle Sears, Roebuck & Co. Craftsman mfg. code for S-K Tools
P-Circle Sears, Roebuck & Co. Craftsman mfg. code for Wilde Tools
Y-Circle Sears, Roebuck & Co. Craftsman mfg. code for McKaig-Hatch
SK-Diamond Sherman-Klove Co. Yes Registered trademark, stamped on tools
SDF-Logo Showa Supana Yes Yes Japanese trademark and forge-mark
S-Circle Smith, H.D. Company Yes Stamped on or forged into tools
Snail-Logo Smith, Thomas & Sons Yes Stamped on or forged into tools
SMCo-Circle Southington Mfg. Yes
S-Circle-2 Starrett, L.S. Company Stamped on sockets
Super-Diamond Super Tool Yes Typically forged into tools
SW-Hex Syracuse Wrench Co. Stamped on later tools
3-Peaks-Circle Three Peaks Giken Stamped on nippers and pliers
TTCo-Triangle Tobrin Tool Company Yes Registered trademark
HIT-Gear Toho Kōki Yes Forge mark with “HIT” in a gear
USMC-Script United Shoe Machinery Yes Stylized script logo
CSCo-Logo Unknown Forge Mark Yes Found on Blackhawk ratchet handle
HTM-Circle Unknown Forge Mark Yes Found on Vulcan Mfg. wrench
MJ-Circle Unknown Forge Mark Yes Found on Beckley-Ralston “Master” ratchet
Rising-Sun Unknown Forge Mark Yes Found on Asahi open-end wrench
SS-Logo Unknown Forge Mark Yes Observed on Billmont No. 8 ratchet
3-Diamonds Utica Drop Forge & Tool Yes Yes Registered trademark and forge mark
3-Ovals Utica Drop Forge & Tool Yes Registered trademark
V-Shield Vlchek Tool Co. Yes “V” in a shield with small inner “T”
SW-Oval Walden-Worcester, Inc. Marked on Stevens-Walden sockets
WMCo-Circle Walden-Worcester, Inc. Initials for Walden Mfg. Co.
WW-Oval Walden-Worcester, Inc. Marked on “Force Formed” sockets
W-Sword Walworth Manufacturing Yes “W” in heraldic sword, used for wrenches
WKCo-Triangle Weber-Knapp Company Yes Registered trademark
WB-Diamond Whitman & Barnes Yes Yes Registered trademark and forge mark
WBCo-Diamond Whitman & Barnes Yes Typically a stamped logo
W-Diamond Williams, J.H. & Co. Yes Yes Registered trademark and forge mark
TW-Circle Williams, T. Company Yes Used as a forge mark
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