Odd Wooden Sliding Gauge

[wvtools]

The only thing I can think of on this one is that the leatherworking tool rule of whatsits may apply, a harness maker's gauge of some sort.

The scale goes from approx. 17 to 19 1/2 and is very hard to read.

[Chillylulu]

I think those are for rug or lacemaking.

Guess

Chilly

[Billman49]

I agree first impression is a rug making sliding hook tool, but I think this is much larger, and there is no needle. Also the slide is tapered, and has locking bolts.

It appears to be some sort of stretcher - I have seen hat stretchers with a tapered core, but this is for something without an end (top). It does look like it could be used in leatherworking, but I cannot see what would need stretching,or would fit this... It's much too small for something like horse collars....

Something like hoserie, or garment sleeves/collars comes to mind.... 17 to 19 1/2 is a large shirt collar size - is that the circumference of the narrowest point of the tool at that setting???

How about a pre-made bow tie makers fitting guage??????

[rusty]

Gun holster?

The sizes are stumping me...

[wvtools]

I cannot see exactly where to line up the marks, but the distance around the form is close to 17, 18, and 19 inches sliding from the one end of the wedge to the other. 

[oldtools]

It appears to be some sort of stretcher for about a 6" diameter? (~1/3 circumference)...
interesting concave & convex curves.. is it ~1"+ thick? maybe to stretch leather stirrups? or something similar?