Rumors have it that the 152 is a 151 with a radiused sole instead of a flat sole. Many more 151s around than 152s, so let’s hope this is true. There are other rumors that say the screw is a 12-24 NC thread, one not normally seen these days.
Now the bad news, I have a 151, but won’t be able to get to it for a few weeks to measure the screw size.
Good news, yours was made from 1911 to 1940, based on the book by T. Lamond. Also good news, as long as you don’t grab a made in England one, or a real modern one, the screws should fit
Yes, the 152’s are much rarer, and the only English made ones I’ve seen have been much newer.
English made Stanley tools generally have Whitworth threads (on the older ones) and Metric on the newer ones.
The American made ones have American threads, although ironically, the “non standard” threads often have standard Whitworth thread pitches. The reason for this is that many of these tool designs are really very old indeed, and Joseph Whitworth was producing standardised threads before William Sellers.
However, just because you find a thread with Whitworth pitch, don’t assume it’s a Whitworth thread. As far as I can determine, they all use standard U.S. 60 degree threadform.
Either way, the pre war Stanley tools are of the highest quality, and superb to use, even now. You would have to spend a lot of money today to match the quality of a pre war Stanley. In fairness though, they were a lot of money back then too!
