John has forwarded me some photos. It looks as if it has been boiled for half a century in a mixture of Castrol 'R' and Lynklife !

The body is clearly stamped 276/014R



It has the gusset under the inlet, and clearly the four radial drillings for use with a Type 76 jet block.



but, and this is probably the crux of the matter, it is bored via the inlet for use with the /R suffix jet block. To my mind, this can only be an owner-modified 276.



Incidentally, despite what Amal published after the war, the Norton WD16H was being fitted with a 276/011 carb as early as December 1936. This was with the Norton type jet block though, and not the /R type.

Thanks Rik
Once we get it apart here - we can check the block for type fitted -
Found out some new info again - which is always good

Br
Jo’b

email (option): jonnyob1@googlemail.com

Yes it is a 276 that has been modified by having the four holes drilled probably to suit the 4 hole jetblock that was laying in his shed/barn.

Agree with John Parker, Body Stamping looks original and it has the large air passage hole in the inlet track as a 276. The 4 holes are drilled for a type 6 jet block and as a later 276 block is fitted the body holes will be blocked off with the 276 jet block so the carb would function ok.