Willie,
According to "The House Of Churchill" by Don Masters, 1961 as the serial numbers allocated were 1961 #7,515 and 1962 #7,699. The list price at the time would have been L600-700 pounds. The engraving would most likely have been done by either C. M. Crick or Geoff Casbard, with locks by Chilton. They worked for Churchill 1958- 1980.
Hope this helps,
Karl
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