Ajs, Matchless, 350cc, 1955. With Banjo. Main Jet 210. Needle Jet 106. Pilot Jet 30. Slide 3.5. 1.1/16" bore. 16M, 16MS, 16MCCS 1955-61 347 cc. Made in England. Please look at all pictures
Amal Carburettor Float needle bottom feed Diam. 2.5 mm L: 75.7 mm Head Diameter: 5.5 mmsuitable for 4.74.274.5.75.275.6.76.276.9.89.2894 and 5 - when fitted with a larger Floatsee last picture