Need advice on buying no. 1 Mk III, by tomorrow if possible

[Thunderbox]

Unit marks more or less ended in 1916, probably due to the very high turnover of rifles through the salvage and reinforcement systems - ie statistically, each infantry rifle may have been reissued dozens of times to men from different units.

Some post-W1 rifles do seem to go back to unit marks on the disk, probably in stable home service units such as the household division or RN.