N Wilson Antiques Clocks has dated this Antique Marine Brass Octant to the Victorian era.

The left arm of the frame retains two lots three shades, one green two red which are fixed on a pivot between the index and horizon glasses, whilst the right has its original sighting pinnula which is screwed into the base. It has two brass feet for resting the instrument upon when not in use.

On the inside of the case lid is what we understand is the makers label which reads 'H. HUGHES. Optical, Nautical & Mathematical Instrument Maker 59 Fenchurch St, London'.
The H.HUGHES Company is listed in 'Barometer Makers & Retailers 1660 - 1900 by Edwin Banfield':
'HUGHES, Henry. w1830-76. Mathematical. Instrument maker. 120 Fenchurch St, London.
This became a well known rendezvous for seamen. The street number was changes to 59 Fenchurch St in 1855.' it is also noted that he became a partner with his son c1876.

The approximate MAXIMUM dimensions are:
CASE: 13 inches / 33 cm long x 11 3/4 inches / 30 cm wide x 4 inches / 10 cm high
OCTANT: 11 3/4 inches / 30 cm long x 9 3/4 inches / 25 cm wide x 3 inches / 7.5 cm high

CONDITION: The octant appears to be in good condition with all elements moving freely. The are no cracks to the shades. There are some age related marks to the mirrors commensurate with age, please view photographs. The item is untested as this is not our area of expertise. The case is also in nice condition but does have a couple of chips to the corner on the top and bottom of the case and there are odd small shrinkage lines and general scuff all of which are commensurate with age and use. There is NO key to the case. Please study photographs carefully as they form part of the description and condition, as what you view is exactly what you will receive
N Wilson Antiques Clocks has dated this Antique Marine Brass Octant to the Victorian era.
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