a good design goe's on for years why change it.
I like the W1 date I understand they also made German kits still in business today I notice,,, 1917 it would be F. Merker Cie. These old kits last forever amazing really.
Ok thanks, then agreed to the Swiss First World War?
The lower boiler would appear to be W1 I was hoping other gents would step in. Did the Swiss have ration indents on the can and whats M.Z.? Then we have a maker who also produced German kits. There is a Gent who studies them in detail send me a pm if you like for details.
btw a note on Swiss kits in general the Norwegians made kits (60's-70's) sold as Swiss.