gorby
I think 350 is actually the number of kits they intend to produce rather than the parts which make up the model.

Diego DH
Maybe includes some photo-etched and masks in the count? The instruction sheet of the first release shows 157 parts.

Robert Podkoński
Gorby is right here - this is typical for Sova-M and Avis. This explains the "short-run" adjective 🙂

gorby
Maybe I shouldn't have said "I think"...that number isn't the number of parts in the box which make up the model, it's the number of kits which they intend to produce – like a limited edition. Avis do the same, confusing thing.
I have this kit, which has only 36 parts in the box and yet the box says 500pcs.
Lee-Richards Annular Monoplane-3 (AviS BX 48001, 1:48)

Treehugger 著者
Oh this is weird. I thought it meant the number of parts in the box. So a "short run" then.