I am sure this type of head has been discussed here before. Whilst the general layout is Austin Seven like, the head stud layout differs, note the centre stud is not in line with the others (or visa versa). The centre water transfer hole also looks v large.

I've no idea what it is. Just to note Rosengart unlike other foreign built sevens did not have mirror built engines and were also right hand drive, atleast until the Adler company got involved circa 1936

Location: Oakley hants

My guess is that it'll be a 1920 Coventry Climax head. They made lots of engines in that period for 'assemblers'.

I believe it may be a Triumph Super 7 cylinder head

http://car-from-uk.com/sale.php?id=143412


Regards

Ben

Thanks Ben, mystery solved!

I recall that Stanley Edge told me that he worked briefly on the Triumph after he left Longbridge.

Location: Bristol