T. Harris’s Sons,
London Day or Night
Admiralty Telescope

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Early 20th century telescopes are becoming increasingly difficult to find in good original condition, particularly from a pedigreed instrument makerlike T. Harris

Presented is a very large, high quality, British Naval pattern, single draw brass and fine wood telescope from a well-known optician at the turn of the 20th Century, Thos. Harris & Sons. It is engraved, T. Harris & Son – London, Day or Night.


Thos. Harris & Sons was a Globemaker, Mathematical instrument maker, Optician, and Telescope maker, Operating out of London and founded in the latter part of the 18th century, Thomas Harris brought his son, William, into the business in 1806.

By 1817, marketing themselves as ‘opticians to the Royal Family’, the firm T Harris & Son were trading from Great Russell Street (opposite the British Museum). 1846 saw a move to High Holborn Street. The firm remained in business into the 20th century.

DIMENSIONS: It measures 21 closed and 28” extended. Add 1 3/4” for sun shade. The objective lens is 40mm diameter.

Weighs 2 lbs 8 oz.

CONDITION: Admiralty pattern, single draw telescope of brass and fine wood. There is a very pleasing patina of age on both the brass and wood finish. The focus is neither sharp or clear.

Although the optics of many of these antique marine telescopes of that period are not functioning as originally designed, they make beautiful vintage reminders of the period and their use at sea. They should be appreciated for their historical significance and dramatic aesthetics they bring to any collection or decor.

MARKINGS: In Old English Script. T. Harris & Son – London

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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.

Standard Forms of Payment

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