Surface finish might not be perfect/perfect, PLENTY good enough for a rider. Jetting as supplied: needle jet 106, slide #3, main jet 200.
Apparently excellent copy of the original Amal Concentric, 30mm bore, right hand adjustments. No accessible pilot jet as in Evolution versions, mostly zinc construction as back in the day. Quantity limited, super price, get 'em while you can.
I will answer questions promptly, good luck and thanks for looking.