What did they go for April 1st 1937 out the factory door?
What was the prevailing wage on that date? What was the cost of living? What was the value of the Dollar?
All things being equal I suppose they should be worth somewhere around $5,000 if they were still in production from Britain today. Scarcity factor??? - Probably another $5,000 to $10,000 worth of antiquity.
dieselgman