Many thanks for the enlargement Ernie.
Sixbellsjunction also lists Wadebridge to Wenford tours on 27th April 1963 'The Camel Valleyman' and on 31st October 1964, the 'Commemorative Steam Special' both hauled by 1369.
The latest dated photo I can find of a railcar with whiskers (Branch lines around Bodmin) is of W55001 at Boscarne Exchange Platform on 24th July 1964. Freight services over the NCR ceased on 7th September 1964, so it's fair to assume this view is post this date. I just thought that Covhop's had been banished from Slate Dust traffic by this time. However with the forthcoming Bachmann model I'm certainly not complaining..