[Milmed]

Yes Brian, after posting I also saw the steering wheel with letters TSD read from top, lt and rt but the order may be incorrect. So we could also have STD or TDS or DTS. Have typed these variations into google but no luck with regards to anything SA Navy related.

My thoughts though (with relation to the steering wheel) is for a Transport Depot, so maybe the initials are STD and could refer to 'Supply and Transport Depot' or 'Simonstown Transport Depot'

Andrew, yes I am waiting for Alex to respond as he may have more info with his vast knowledge of Navy insignia.

Regards
Steven