From a ROYAL MARINES COMMANDOS trench. Some idea?

[Matteo La Boccia]

This button came from a trench of Royal Marines Commandos in Salerno battlefield but I think is not WWII age. Some idea

TREBLE GILT STANDARD COLOUR

 

[DCMatt]

Try looking at this page. I didn't see an exact match but your button is similar to late 1700's British Royal Navy Officer's button.

http://www.kingsnavy.com/mem1/navy buttons.htm

DCMatt

 

[Silver Searcher]

Royal Navy Officers button, one-piece. Backmark Firmin, Strand. Measures 30mm dia.
RN Capt/Commander - 1787 RN Lieutanant - 1787
After this issue, Lieutenant will use same design as Captain's Button.
In Use 1787-1795

SS