Snap on industrial PF70N flat selector

Snap on PF70N  3/8 drive with flat selector which uses a screw to hold the selector switch.  .   Date code 1937.  The PF70N Shows up in the 37 industrial cat. Does not have the Snap on name.  Only model number and date code. 

Drive Size: 
Date Code: 
1937
Ratchet Manufacturer: 
Ratchet Brand: 
Production Begin Year: 
Production End Year: 
Year Produced: 
Ratchet Overall Length: 
Full Ratchet-Drive Side: 
Drive Side Stampings: 
Ratchet Reverse Side: 
Ratchet Reverse Stampings: 
Drive Type: 
Model: 
PF70N
Tooth Count: 
20
Ratchet Max Head Width: 
1.10"
Ratchet Head Thickness: 
0.55"