Vintage Maritime Sextant WATANABE Japan Wood Box No.75547 Certificate Simex Jr.?

We are pleased to offer for sale, Vintage Sextant Japanese Simex, Jr.? WATANABE, Made in Japan, Wood Case, No. 75547 Certificate included.
Manufactured by: Watanabe?, similar to Simex Jr.? 3x Made in Japan Year: Certificate of examination shows on bottom 3-12-26, Aug 5-1975 Wood Case: Inside the wood case has a metal fitted holder, compartment for tool and screwdriver. The outside of the wood case has a handle that works good, one locking clasp and has the original key. Certificate included and is inside the case.
Box Measurements: approx. 9 1/2" W x 8 1/2" D x 5" H Weight Sextant : 1 lb. 14.70oz Weight Wood Case: 2 lb. 14.50 oz Total Weight : 4 lbs 13.25
Engraved on the arc is No. 75547 (left side), WATANABE, Made in Japan (right side).
The arc is divided to 110 degrees , black lattice frame, index shades and horizon shades, quick release index arm ever with micrometer drum, the mirror looks very old and shades appear to in good condition. Cosmetically the sextant appears to be very old.
Condition: Pre-owned, this piece appears to be in good vintage condition. The wood case and the sextant have not been cleaned, they both have wear and scratches, the mirror looks very old, rusted areas. We are unsure of its functional, as we are unable to test it. Please preview all photographs as they are part of the description
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