What Diagram is an RM (Dining Vehicle)?

[Mallard60022]

I have discovered that there was an RM booked as the single Dining provision on the 12.30 Exeter Waterloo in August 1961. Can anyone identify what Diagram (& design) coach this was please? (Not the actual coach......unless, of course, you happen to have that info  ). I can't find an RM in my reference materials but maybe I'm being short sighted? There are RMB Mk1s. Might it have been one of these SR allocated coaches?

Thanks

Phil

Edited November 2, 2017 by Mallard60022

[mark54]

It's a typo. Looking at the Supplement to CWN Loco-Hauled Trains London (Western) Southern & Western for summer 1961, on Saturdays only in the Restaurant & Buffet Car workings, the 12:30 Exeter-Waterloo is listed with RMB 1849.

[Mallard60022]

Just as an aside, when rummaging through my Mk1 boxes i found three (yes three) BR Green RMBs that I had forgotten I had. Doh! However, no conversions required (yet).

Thanks for your help everyone.

Phil