S&W stocks made before 1968 had the uncheckered area around the retaining screw seen in Hal's posted pictures. The stocks themselves had a slightly different contour and to me feel more comfortable than the later style. Sort of less chunky. These early stocks for the K frames (10, 19, 66 etc) are fairly cheap and easy to find. The same style for the N frames (24, 25, 27 etc) have gotten rather pricey recently. The early N frame "diamond" Target stocks have become truly outrageous in price, selling for $250-$400 on ebay.