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Ranks 5 Stars

The overall condition of this sextant is excellent. It is just waiting to go back to sea and where it can be put back to use or for a serious student desiring the whole horizon feature rarely found on a Tamaya

PRICE $750.00

SHIPPING and handling to 48 contiguous States $25.00

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I’ve been involved selling Tamaya sextants for over 35 years, and back then, my company Nautech Maritime Corporation was instrumental in the design and introduction of their MS 733 SPICA, MS 833 Jupiter, and MS 933 Venus sextants and the famous NC 2, and NC 77 navigation computers to the US Market.

Therefore, I’m pleased to offer a 1982 Tamaya Jupiter sextant, Serial Number 65161, with a 4 x 40 scope and the optional whole horizon mirror they called “UNIVISION”. This feature was a $350.00 option when it was available, but it has not been offered in the U.S. for quite some time.

This sextant is in exceptional condition, and shows little evidence of use except that one cap for the ocular lens of the scope is missing and there is no factory booklet. The case is the more recent style plastic one which is much improved over the early wood cases. The instrument’s certificate dated, February 17, 1982, shows “0” error over its usable range.

CONDITION: Irrespective of age, overall condition, is excellent. Adjustable index error is 1′ on the arc and side error is nil. All moving parts turn freely. Nothing is broken. The only exceptions are that one of circular shade for the scopes’ ocular lens is missing, and there is no Tamaya booklet. The end cap is rarely, if ever, used. There is some light scratching in the case’s interior. The mirrors are perpendicular to frame. Both mirrors are without blemish. The case is in excellent condition. The sextant’s paint on the frame is as new. All the numbers match.

This sextant is exceptional in condition and because of its special features is perfect for someone desiring the UNIVISION feature
STAR RATING: Without qualification, this
instrument rates 5 STARS

QUALIFICATIONS: We are one of the few company’s still selling navigation
instruments that know anything about them. For purposes of judging whether Joel’s opinion counts, he was the editor of the chapter on sextants of the 1977 Edition of “Bowditch”, The American Practical Navigator, NAVPUB 9; a member of the U.S. Naval Academy Navigation Symposium Board, 1975 -1978; the author of a book on marine sextants, Cornell Maritime Press,1975, and the founding president of Nautech Maritime Corporation which partnered with Tamaya of Japan in the introduction of the MS 733 Spica, the MS 833, Jupiter, MS 933 Venus sextants and the famous NC-2 navigation computer, in the U.S. market. Joel is a retired Master Mariner, and held a U.S. Navy “D” Qualification as a Senior Skipper – Oceans. For six years he was a Varsity Offshore Coach at the U.S. Naval Academy.


Measuring Range: -5 to 125 degrees
Accuracy: +/-12 seconds.
4x40mm: angle of view 7 degrees, relative brightness 100. All optics are fully coated.
Die cast aluminum alloy with corrosion resistant black finish. Bronze arc.
Vernier Scale: has 5 marks & reads
to 0.2′.
Index Mirror: 57 x 42 mm. aluminized on the rear side.
Horizon Mirror: 57mm diameter – UNIVISION
whole horizon
1. 4 for index mirror
2. 3 for
horizon mirror
3. 2 shade caps for telescope ocular lens
Weight: 3 lbs 12 oz, 7 lbs in case
Carrying case: Hi
impact plastic
1 Tamaya Nautech Model 833 sextant frame
1 4 x 40 Star scope
1 Whole horizon mirror
1 bulb installed
1 spare bulb
1 Mirror adjustment wrench
1 shade cap for telescope
1 New style plastic sextant case
1 Tamaya Certificate of Accuracy
Batteries included. They should be inserted with the positive terminal to the top.

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Shipping & Packaging

The cost of shipping, packing, handling, and insurance to your destination, will be calculated point to point and is an additional charge. You may email us to get these costs. We price our shipping honestly, but we expect to be reimbursed for the nominal cost of packaging materials and handling.

Our Unconditional 'No Nonsense' Guarantee

If not completely satisfied with your purchase it may be returned, if without damage, within three days of receipt in its original packaging. Return items must be insured for their full value. Only a prior email authorization by us for the return is required. Shipping charges are refundable if due to our error within the continental United States.

International buyers welcome, but inquire first. We have satisfied customers worldwide.

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Bank wire transfer, cashier’s check, money order, or personal check in which case the item will be held until cleared. Our prices are quoted net to us so that the use of credit cards or PayPal incur extra charges. Terms on overseas sales are different.

Established in 2003

Celebrating 18 Years of Exellence in Nautical Antiques

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