Oldtuleguy
Well-known member
- Joined
- Nov 4, 2017
- Messages
- 10,461
There was a pretty short time line where the ratchets evolved to what we usually see, I think 34 to maybe 37. The one in the ad we know is 35. The patent for that one should be 1981526, applied for 12/7/33, granted 11/20/34. The example I have is pat pending, (2103556) applied for 3/13/36 and granted 12 28 37. There may be one other in between version.
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