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Looks like the numbers are:

BWCA58450473
3A7281

I list all the boats on that page that are verified by Boston Whaler.
See the first boats made in 1973:
http://www.whalercentral.com/articles...icle_id=17

You would need to have your numbers verified by Boston Whaler to make positively sure it left the factory on 0473 as Montauk.
I would then be happy to add your boat on the Montauk list.

If it did not leave the factory as a Montauk, then someone added the console and RPS at a later date. Could have even been a dealer but we don't know unless you have more paperwork or info.