Avia 15 Jewel Watch - Denison Aquatite Steel Case

A very high quality 1950's watch , Avia 15 jewel in an English made Denison case - This wouldn't be seen on your average clerical / managers wrist, more the provence of sportsmen, or servicemen - A very rough tough watch at the time.
This example is in good condition, Perfect dial, running strongly and keeping time - Case 30mmx38mm.