Hi Roger
The only photo listed on sammel for M53xx is under wirral min ships. It's British Prince, M53c, https://sammelhafen.de/en/index.php?p=details&schiff=15722
Other versions are listed, but no photos

Underneath the model is hand written 'M53 S HA????'. [?= not legible] It has a red waterline, black topsides, white suoerstructure, black funnel

regards
John