When Did Rolex Stop Offering GF Cases?

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stopped by the AD this afternoon to pick-up a necklace that was being restrung & while waiting my turn for assistance, took a glance at the showcase where they keep estate/consignment jewelry & watches.

I noticed a man's gold Rolex DJ & when I inquired about it, the salesperson said it was 14K gold filled/circa 1960s.

during what timeframe did Rolex offer gold-filled cases & when/why did they discontinue the practice? was it due to a lack of customer demand and/or the production costs of rolling gold onto a base metal?

some of the older GF cases from the 1950s hold up pretty well...I have a 1956 Hamilton K-407 automatic that's 10K GF & the exterior finish shows no sign of wear or thinning. the same could be said of my old 14K GF Cross pen/pencil & they are constantly subjected to everyday handling.

if it were hypothetically offered again, would something like a GF Rolex case have any takers/buyers in today's modern watch world?