For the life of me, I don't know why this elliptical flat measures 1 and ~23/32" (1.70") across the minor axis--I just found this out when I went to measure it for you to list for this ad and checked it 3 times--hmmmh! I'm almost certain I traded my 1.83" for this supposed 1.52" back when--I guess there was a mix-up by the seller. Anyway, that same seller told me this was an excellent mirror. Never mounted it myself, so I can't say.
I suppose this is very interesting if you are optimizing size on something and a 1.83" is too large and a 1.52" too small.
Great condition--clean and nothing wrong with it that I can tell. Edge blackened by me using a sharpie marker for glare control.
How about $22.50 shipped in the CONUS?