That's an Enfield (RSAF) production No.2 Revolver.
A poorly struck marking with the bottom portion missing. The model is the MkI**.

The first character is the late 'EnfielD' marking of an E superimposed over a D. The second is the 'I' for MkI and the two stars (5 point stars being the later type used) for the last modification in the series to purpose built DA only.

Should be late war time mfg in the 'S to 'Z' serial# prefix. Probably mid '42 to the end of the war.

'Albion Motors Ltd' mfg revolvers had Albion spelled out on the side in a sort of script.