NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Matt Harvey
Date: 2025 Jun 7, 00:36 -0700
Dear NavList members,
I’m offering a Tamaya MS-633 micrometer marine sextant for sale — complete, well-preserved, and certified with zero arc-index error. This is a superb example of Japanese precision, ideal for celestial navigation, instruction, or serious collection.
Details:
Model: Tamaya MS-633 (Toizaki & Co. Ltd., Japan)
Serial No.: 4448
Inspection Date: 23 February 1978
Arc Corrections: Zero at all standard points (see certificate)
Includes:
7x wide-angle telescope (with lens cap)
12x high-magnification telescope with crosshair reticle (also with cap; minor barrel scratch, optics unaffected)
Original Tamaya wooden case with green felt interior
(Note: leather carry handle is broken but mounting hardware intact)
Original instruction manual and Certificate of Examination
Both lens caps, fitted compartments, and clean optics throughout
Condition: Excellent. Recently cleaned. Smooth micrometer movement. No corrosion, no mirror desilvering.
Location: Sydney, Australia
eBay Listing – Tamaya MS-633 Sextant
Best regards,
Matt






