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1941 Maltby S/N 12411 looking for scope S/N of an indistinct value.

The most likely choices:

1372
1572
1672
1872

Most likely 1372 or 1572, but would be tickled w/ any of the above!

OK. I'll throw my hat in-

No4 Mk1 Trials rifle needs No32 Mk1 scope S/N 5966 (oddly high number for a trials, but it appears to have been the only # applied to the wrist) or something very early...