Vent Rib question

[Twoatlow8]

There are some missing books from the mid to late 20’s the Vent Rib was introduced in 1926 I think.
I have a 32” VHE Trap, I have seen two others so I don’t think 18 is the number, but they are not common.

[Double Lab]

Add one more VHE 32'' vent rib trap to the talley, Double triggers and a ball grip no less.

[Autumn Daze]

I have a 32" VHE trap here also. In fact I shot it today!