Only the Model 57 (introduced in 1964) was standard with coke bottle stocks like the Model 29. However, I believe any N-frame could be ordered with those stocks for an extra amount. I doubt that many were special ordered as most people did not order their S&Ws, but just bought them off of the dealer's shelf.

I placed an order for a 44 Magnum in 1971. It took fourteen months to arrive and I had to take whatever came in as there was a line of orders behind mine. It wasn't until late 73 or early 74 that Model 29s or 57s began to become more generally available to FFL holders (I had an FFL back then).

Bill