Silver English Deck Watch

An early 20^th Century English lever deck watch in a silver open face case.  Gilt three quarter plate keyless movement with broad Ministry of Defence broad arrow.  Plain cock with polished steel regulator, compensation balance with blue steel overcoil hairspring.  Screwed in jewelling.  English table roller lever escapement.  Signed white enamel dial with Ministry of Defence broad arrow, subsidiary seconds, Roman numerals, blue steel hands.  Plain silver open face case, maker's mark "WB" in a rectangle and number corresponding to that on the movement.