I have searched the tubes, water-table, locks ad nauseum & I can find a Preliminary Datastring = Final Datastring as far as diameters.

There is an Imperial Eagle with a 3 on the breastplate stamped on one flat.

On the other flat is the Vejprty Coat of Arms and the German phrase >>NICHT FÜR KUGEL<<

I just cannot find a Weipert/Vejprty Nitro stamp nor the Preliminary script EW stamp. But there are German stamps on at least one tube and with the Schilling Forge involved there must have been a Crown over G that was worked off.

I do wonder if those numbers >>.62<< & >>.63<< below the >>.450<< were to note a date or length in mm.

Hochachtungsvoll,

Raimey
rse