Allen "Universal Wrench" 1/2" Drive Ratchet - Patent Pending

Because this example is stamped "Patent Pending," we can conclusively date it to between 1914 and 1918, when the patent was under review.

Drive Size: 
Ratchet Manufacturer: 
Ratchet Brand: 
Production Begin Year: 
Production End Year: 
Ratchet Overall Length: 
Full Ratchet-Drive Side: 
Drive Side Stampings: 
Ratchet Reverse Stampings: 
Head Style: 
Tooth Count: 
12
Ratchet Guts: 
Ratchet Mechanism: