One French Solex 40mm updraught caburetor, type 40 VAFD N
The mounting holes for the intake are 50mm apart. The mounting holes at the top (where the screws are) are 45mm apart.
Vacuum fuel feed system by Autovac Mfg.Co.Ltd /Stockport /England. Includes mounting brackets. but suction and feed taps missing, otherwise good condition.