Vintage Tonair Applanation Tonometer Mark II

Tonair Applanation Tonometer. Measures intraocular pressure. Nice vintage condition, not sure if it works.  I inherited this from my father who was  an optometrist.  Includes original manual, white paper from Optical Journal review from 1965 and original flyer.  It listed for $350 new in the 1960's.  The case locks well and is imprinted with Nielson, HDWE Hartford on the latch. I'm also listing some other optometric items as well.  Sold as is in vintage condition.  No returns or partial refunds.  Please review photos for condition.