Help to identify and age please

Can you help and identify and age this engine please? I've recently acquired this engine it has a few bits missing flywheel, cowlings etc, it does not have any identification plate or ref. From browsing the net closest engine i can see is petter PAZ1 but not convinced. Id also like to know if its worth restoring or weighing in as scrap. Many thanks in advance

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Armstrong Siddeley diesel engine , possibly type AS1, 5-6hp approx, built 1946 to mid 1950s, then bulit by Petters until 1962

Hi Sagapo,
I agree with Blue cat a Armstrong Siddeley I came across one in a narrow boat on the Leeds Liverpool canal a old boy and his dog lived aboard it lovely sounding engine he told me it was very reliable and had never failed him.
Regards,
Chiefy.

Many thanks lads for identifying the engine for me, i was going around in circles. Now to try and hunt down some spares a see if can get her running.

You might want to start with a flywheel, unless you have it squirelled away somewhere

Is it an important part ?

It stops the engine falling forwards .....