I'm researching a potential model of Watford Junction in the early 60s, to include the transition from steam to diesel, but prior to electrification.
So far I've found plenty of evidence for express and freight services that I might model. However I'm struggling to find something for suburban services other than the DC lines that terminated at Watford, whereas I'm thinking of services that would run through to Bletchley, etc.
I think that Class AM10 EMUs were introduced following electrification in 1965, so perhaps a more specific question is what traction and stock did these EMUs replace?
Thanks in advance for any pointers...