a original second war vintage  silver gents signet ring 

cast theatre  made  silver parachute forces / special forces  ring 

 heavy good size weight   of 17.3 grams  

has been personally   sized        uk size W       measuring inside slightly oval 2.2cm across side to side and back to front 2cm 

 no maker or hallmarks 

theatre made 

with front panel line scratch like  detail of a parachute jump wing / award brevet 

in  good  worn condition  

has  one file mark   most likely a merchant  test for silver see last photo