Gearbox identification

[David.H]

The block should have the engine number stamped inside the valve chest.

Thanks for that bit of information!
I shan't bother for a bit - I spent some time getting the valve chest cover gasket to fit & am unwilling to disturb it at least until the engine has run and I find it leaks!

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This shows the rear markings on a Speedy gearbox.

Thank you.
My number is stamped to the rear by the filler "flange"  the S530 (as the top) is clearly stamped , there is the indication of an E (?) near the S. I will try & take a picture