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If all options the same, it’s doubtful there was another W31 exactly equipped?
Here’s one Ad from 03/70, the 442 part or W31 a mistake also whoever was creating Walters’ Ads seems to have got the 442 and W31 mixed up in some of their other Ads too.
I'll look deeper and post anything more I see that’s relevant also please ask the Dealer’s son if he wants to search any specific cars or salesman names he remembers.
~ Pete
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