Leonard Rogers says "This won't be from the 1970's because "The Great Marquess" wasn't on the main line in the 1970's. It certainly isn't from the loco's time on the main line in the 1960's either : this photo does not match a published picture from the only recorded time it visited Chester (10/5/64) before its prolonged withdrawal from service in 1967. The colour-light signals suggest this is after its return to the main line in the late 'eighties or after"