This is a selection of 3 antique carbon steel Metalworking or Measurement Tools. One is a Outside Caliper marked McIntosh Heather. It has a bow spring range approx. 6 ¼ inches. I found “McIntosh Heather is an old hardware concern established in Cleveland, OH in 1888. It went though names changes and used the name McIntosh Heather during the years of 1903- 1911.” I am also including two different Dividers that do not have any maker's markings. One has a stop ring and opens to approx. 6 5/8 inches. The longer almost 11 inches one opens to 7 inches but has no stop end on the bolt nut and does not have a strong bow spring so is not usable wide open. Both have very sharp points. These are well used with rust areas, stains, wear, one not strong spring so sold as is. The McIntosh Heather may be collectible as I could not find one on a search.