piston identification

[Gary Watson]

Can anyone help me identify the piston in my 1950 Riley ? The name on the inside says Noral and two numbers are present one being E 22 the other S210. On top of piston is stamped Covmo with a B and aWS stamped in it.

[Allan Atherton]

Is the Riley a motorcycle? Are you saying the piston is not for the Riley, and you want to know what the piston is really for?