I forgot to add that the Zella Sankt Blasii - Mehlis >>Nitro<< Proof was added in 1936 and more than likely the chambers were lengthened 5mm or more or were altered. The Belgian Sourced platform was finished in some amount by JJ and then in 1936 it went thru the full regiment of Zella-Mehlis Proofs. I don't know JJ's serial number sequence compared to time but I would hazard a guess this one was completed pre-WWI and more than likely pre-Nitro tests(rules change) for the German Custodian that ordered the platform from JJ.
Hochachtungsvoll,
Raimey
rse
