I went on a trip to Eskilstuna to pick this small but rare grouping up
Pilot steering wheel
Pilot leather helmet
The big cartridge is for the german WW2 12,7 cm S.K. C/34 and/or 12,7 cm Abkomm Kanone L/35 (which was the sub caliber system for 38 cm S.K. C/34 and i think 40,6 cm S.K. C/34 as well.).
Smaller cartridges ones, german WW2 3,7 cm S.K. C/30.
The shell is the early model 3,7 cm Spgr. L/4,1, which had a self destructor that was ignited by the tracer.
Thanks for the info Zünder & Frans H @ WAF
Big thank you to Fredrik for selling me these