This is clearly stated in most all the Starrett catalogs from 1909 to the 1940's era.
Is there any online source of information on the logos Starrett used? Roger Smith is well known for his studies of Stanley plane dates.
Despite what one might find about Starrett dating on other websites, I believe the Roger K Smith study of catalogs is the most correct.
We also note that the name change was applied in 1909 to the way all Starrett tools were marked." Bill, I can't make out the top rule, but the bottom rule is 1930 or more modern. Starrett tool dating has been discussed in other threads.
A." The lower one has a design of outside calipers, a micrometer, and a one-piece square kind of jumbled together, with "The L. Roger sold me a bunch of early catalogs and they clearly show that Starrett added the "THE" in 1896. I suggest that no matter where else you read about Starrett dates, only the Smith study is accurate. Do you know of any source for reprints of early (pre no. I know about Cope, but would love to have the in between catalogs.
Even catalog cuts went unchanged for one or more catalogs. I'm sure all Starrett collectors will e delighted to have this.
Old dies for marking were used past logo change dates until they wore out.
Starrett manufacturing is 'piece-work' and old and new parts were intermixed, sometimes for years!
I haven't been able to find info on the internet about what logos L. And, I personally have never seen the #2-5 catalog. And even though I have gone thru all my catalogs regularly, I keep learning more and am often surprised by some feature or even tool that I missed.
The picture attached (if I've done this right) is of two rules from my arsenal. It is actually a folded pamphlet, not really a catalog. That was in the days when only Rivett608, me and maybe a others bought old machinist stuff at New England tool sales.
I know that at least one of us on this group has a copy of Starrett catalog #1. I've owned many of mine for maybe 20 years ever since I bought them from Roger.
Indeed, it is not used in catalog 13 and is used in catalog 14. Thanks, hms50 Hugh, Sorry, I don't know of any other sources for Starrett catalogs.