Blawkhawk ZW1301 ratchet

[buzbuz39]

Hello everyone, recently acquired this ratchet and I can't really find anything out about it. So I'll post some pictures and hopefully somebody knows a little something about it. The ratchet is 3/4 inch drive and I've posted a couple pictures one of it next to a 916 Blackhawk ratchet and a half inch craftsman ratchet.
thanks ben

 

[Steven67fr]

Big, gnarley ratchet with a removable drive plug. I believe Williams had a ratchet of a similar style back in the 30's/maybe early 40's