I like puzzles !
Found some more info that doesn't really help with the badges but does give details about the WW2 Motor Mechanic Branch :
1941
Quote:
On the institution of the Motor Mechanic Branch 6th March 1941 , ratings specially entered for the charge and maintenance of certain diesel driven craft were designated as Motor Mechanic (D).
(Refs. A.F.O. 973/41 and A.F.O. 3357/41)
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Other designations :
Motor Mechanic (FM) - Fairmile.
Motor Mechanic (GC) - Miscellaneous (General craft ?).
Motor Mechanic (L) - Minesweeping craft.
Motor Mechanic (MTB) - Motor Torpedo Boat , Motor Anti-Submarine Boat.
The (D) category of Motor Mechanics lapsed on 2nd July 1942 , when all Motor Mechanics - other than Motor Mechanic (L) - were reclassified to indicate the type of engine for which they were trained or qualified by experience to operate and maintain (Ref. A.F.O. 3090/42).
The site has links to the 1942 designations :- (A) , (B) , (C) and (DHP) which show the different types of engines.
Scroll down to :
BRANCHES AND SUB-BRANCHES INSTITUTED DURING PERIOD 1941 to 1942
https://www.rnranksratings.com/
So , is it possible that the RNVR Motor Mechanic Branch was superseded/replaced by the new Branch and the double bladed propeller badges were introduced for RN personell ?
Also , would the new Motor Mechanic Branch be mainly shore/shipyard based ?
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