Antique McLean Tonometer & Antique Cross Corneal Trephine + original leather boxes lined with green satin and velvet . Both manufactured by E.B. Meyrowitz, New York. These antique physician's or doctor's medical instruments, surgical tools, medical devices were used by Ophthalmologists and Optometrists. Great items for collector of antique medical instruments, scientific instruments. Early 20th Century. Condition is Used. No reserve!