Vintage 10 Inch Boosey and Hawkes Ltd Presentation Hunting Horn 1953

Vintage Boosey & Hawkes Ltd siilver/nickle plated Hunting Horn - stamped BOOSEY & HAWKES LTD MAKERS LONDON -MADE IN ENGLAND its serial number 183394 dates it to 1953. The horn is in good condition for its age ,  the inscription reads  

PRESENTED TO next bit scratched out, a name of a person Military I would think - H W DE' ATH 
BY THE CIVILLIAN AND
MILITARY COLLEAGUES AT HYTHE
ON HIS APPOINTMENT TO - A next bit scratched out

All seems a bit cloak & dagger , my limited research so far points to a connection with the Admiralty