Primus Patent 1892-1896

For sure before 1896 ( year of introducing new type of NRV by Hjorth )

 

Yes, dating is probably 1894-late1895

 

I think, that it is almost impossible to differenciate copies between e.g. 1893 and 1894

 

In 1893/early-mid 1894 the pump didn’t have yet the hex shape. So exactly like my primus the dating is narrow between late 1894 and late 1895.

Nicola

 

That's true, earlier issues had round pump provided with two holes for special wrench

 

Stanisław, clearly there is no exact information. We base our dating on common agreement between us and by the dating of some advertisings.