Zero to 50 p.s.i , or zero to 3.5 kg/cm oil pressure gauge. Two inch diameter, I don't know the maker but it appears to have never been used. Nice bezel. Very Cheap!
Vintage Zenith 42 mm updraught Carburettor suit Bugatti Type 37 A or Type 44 or 49. Came to me with various Bugatti spares but not needed for my project.