Matex Approx 12" Vernier Height Gauge - As Photo
Marked Patent applied for.
3 parts to make 3 different size height gauges the largest around 12"
Quite a fine scale, marked 20/1000 two scales one 0-1-2-3-4-5 with 4 increments inbetween, the bottom scale marked 0,5,10,15,20 with 4 incrments.
Looks well made.
With the parts as seen in photo.