I believe this Gurley Light Mountain Solar Transit was made in 1885, plus or minus a year or two, based on the Aregood Gurley Transit Dating Guide

The transit is in really nice shape as the pictures evidence.

The box is also in nice shape, and includes a wonderful label that Gurley used in the 1883 through 1886 time frame based on the Gurley Manuals.

The solar unit and solar side mount level MAY not be original to this transit, however. The Burt solar attachment and the side mount level were in the the box with this transit when I purchased the transit, but the stem base for the Burt unit was on another instrument I acquired at the same time. So I cannot guarantee that all the solar parts are original to this transit. You can see the other transit here. I will reduce the price of the other transit by $100 if you buy the solar transit and the other transit at the same time. I personally think they should be kept together since the solar apparatus is original to one of them.

This light mountain transit has a 4 inch needle and an 8 inch telescope.

Everything seems to work really nicely.

Nice optics, but bordering on slightly cloudy at a distance. Crosshairs and stadia wires are present.

The only other flaw - the solar side mounted level has lost its fluid. The cracked glass vial does not look to be original either.

The solar adjustment bar is in the bottom of the case. The transit also comes with lens cover, sunscreen, screwdriver, and a couple of small tools.

This is a really nice early solar transit.

Please take a look at the 360 Degree View of the instrument, and zoom in on various views. This instrument merits a close inspection.

I have a good deal of information about Gurley, including some production information, posted on my Gurley Maker Webpage.