I bought my 1st rep in the late 70s but, at the risk of overexposing the members to its inimitable charms, this is my 1st (now 20 years old) franken (I replaced the two tone end links & bracelet clasp with gen parts, which, back then, could be purchased over-the-counter from most ADs)
Back then, reps were so poorly made & so few people knew much about Rolex watches that this one was quite a benchmark. It was the MBW DRSD of its day & considered outrageously priced since the retail on the gen Datejust was less than about $2000 at the time. I retain it as a benchmark against which all newcomers are measured.
And in case anyone is interested, here are a few pages from the last catalogue/order form from 'Swiss Enterprises', which is the company I ordered this watch from back (according to the post date on the envelope) in 12/87. My watch was a special custom order (because I was a regular customer they located the 'linen' dial for me) based on #203-AQL (the 'L' was the 'ultimate' rep at the time -- the 1st with an ETA movement & laser-cut (real) gold-plated bezel)
Back then (before the web), if you wanted something better than the average Canal Street fake, you had to find someone who knew someone, because distribution was done completely by word-of-mouth.