Quote Originally Posted by Peter Laidlericon View Post
One interesting point to come out of sjt's photos is that his WW 1942 dated Mk1 telescope number 1950 is that you can see that the 2 of 1942 has over-engraved the previous 1 of its original date of 1941. This clearly gives the scope number collectors an idea of when annual production changed.....1941 - 42 was approx 1950. That is a production run of 950 telescopes for 1941.....

I have also seen this on Watson 2108............

God, it's snowing too.................
Whoops, just remembered before taking off- My 1941/2 overstamp Watson is S/N 1990, so no help there for an earlier change over number.