The 'EVOLUTION' carb by Wassell, imported from Britain. Direct replacement for Amal 928 Concentric Premier.
Jetting as supplied: pilot jet 17, needle jet 106, slide #3, main jet 180.
The carburetor has all the advancements of the Amal 'Premier': removable pilot jet, hard-anodized billet slide and adjustable float.
Passivated surface finish coating is not as perfect as I'd prefer, uneven in spots, but it is what it is. If you're building a rider it will work better than fine, and the price can't be beat.
I will answer questions promptly, good luck and thanks for looking.