SMALL ROLLS-ROYCE SPANNER 3/16 X 1/4 F2892

In good used condition, with a few signs of age and use

Size is 3 inches long. Marked on one side "F2892" ., and ROLLS-ROYCEsizes marked are  3/16  and 1/4 (BS)." , I have this spanner listed for SG, 20HP, P2 and Derby Bentley but it may suit other models.