The platform passed proof say in 1909 or 1910, but not after as in 1911/1912 the Plug Gauge Designation was dropped & mm was added. Plus it is a German inland and it doesn't wear a Nitro Stamp for the 16 bore scattergun.

With all the controversy with who was @ the Helm and who had what advancements, changes in management was often till all the litigation was sorted.

Hochachtungsvoll,

Raimey
rse