Pattern Numbers Stamped on Tangs

[KAW]

I have hopes of narrowing down the age of my Schrade Walden 234K, which appears to be one of the longest running model they produced. I was wondering when did they start stamping the pattern number on the tang of the back side of the blade. Please correct me if I am wrong, but it seems this practice did not begin until after becoming Schrade Walden & perhaps adopting Ulster's practice of doing such, which seems to go back many years prior to the Baer takeover.

Did it end with the discontinuance of the Schrade Walden?... or did it continue with the open stock line of Schrade Cutlery Corp.?

An inquiring mind would like to know.....

[tongueriver]

From what I have seen I suspect pattern numbers have been on Schrade knives ever since about 1952-1954. Maybe a little earlier on some, maybe a little later on others; I would not lay any money on the table as to a more exact date.

[KAW]

Thanks tongueriver for your post. If that is the case, it helps narrow down the range.