Well it's news to me...thank you...It shows you how few graded Remingtons I've owned...I better send for Semmers book...
.
I've noticed people interchange hollow and concave ...and I've seen drawings of a raised (flat on top) hollow ribs in European catalogs..based on how much my 94s weigh, I would say that Remington meant concave
.
132437 is also a C Grade (improved lock)... two C Grades exactly 400 numbers apart?...037 and 437...I don't have 132437, just the butt stock with the serial number clearly marked...along with WHD's initials...