I was looking for an early Ferlacher with a tubeset weight stamp, which must have been introduced @ the turn of the 20th Century? I seem to recall that date stamping occurred as early as 1897 and the below Josef Hambrusch hammer 76.5cm example has a 1899 preliminary datastring and a 1900 final datastring but no weight applied. Now I don't exactly know how that worked because a tubeset with a preliminary datastring had to be submitted in that year as the tubeset was temporarily exempt from proof for less than one year. In Austria under Decree Number 174 on August 23rd, 1899, a prooflaw update was issued to address the need for a semi-smokeless proof. Here is where they Nitro Stamps were added.

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Hochachtungsvoll,

Raimey
rse