Old Make Do Ruler with Hand-Carved Numbers - Presumed for Liquid Measure Massachusetts historic sign I've always got an eye

I've always got an eye out for vintage DLM (Developmental  Learning Materials) sets produced in the 60s and 70s for use in schools

or really anywhere at all

green and yellow stripes

limberjims

I especially love the stem on this one

Old Make Do Ruler with Hand-Carved Numbers - Presumed for Liquid Measure Massachusetts historic sign I've always got an eyeBest understood through detail photos, this ruler measures 12 inches long, but is carved with numbers that do not correspond to inches, but rather I believe marked liquid ounces. What I really like about this in addition to the smooth, beautifully worn wood that makes it just a pleasure to hold is that clearly it was a particular solution to a particular situation, I would think made to use in conjunction with a very specific vessel, perhaps a milking