Older Heiser Sheath Dating Help for Model 3-7

[Chipndale]

I am new to Knife network and the Randall Forum. I'm seeking help to to learn more about the two Randall Model 3 -7 knives and what I think are uncommon Heiser sheaths. I purchased the Wickersham book and it has not helped in dating the features of these knives.

1. The light brown sheath with cross guard keeper had brass buttons, (marked ins##e snap "DOT") that might typically have been seen on older Moore sheaths. Was this just old inventory stock that Randall would use on later sheaths? I've not seen this feature on Heiser sheaths before and I'm hoping to learn more about this. What range for date would this knife been made it.

2. The dark brown sheath is a corn row sheath. What era were corn row sheaths made? The typical knife model stamping on the back of the sheath is different. What is the meaning (if any) of the "I I" stamp over the Heiser Logo? Any help with explaining this and dating the knife features would be appreciated.