The Observatory (Lot 1252S) past producer is located at approximately 1189 metres elevation on the western slopes of King Solomon Mountain, 1.75 kilometres east-northeast of Carmi, British Columbia.

The area is underlain by intrusives of the Jurassic Westkettle Batholith. The Westkettle Batholith varies in composition from granodiorite to quartz diorite to diorite. The granodiorite phase is medium-grained and grey to pink with chlorite or occasionally biotite-altered mafics. Local epidote and minor potassic alteration also occur. The quartz diorite phase is commonly foliated and porphyritic. These phases are intruded by quartz monzonite, quartz-k-feldspar and andesitic dikes.

Locally, an adit, referred to as the ’Hard’ adit, and number of surface trenches expose a 25 to 50 centimetre wide shear zone hosting a quartz vein mineralized with pyrite, galena, sphalerite and possible chalcopyrite.

In 1987, a 25-centimetre chip sample (CAR 35) from the adit assayed 800.0 grams per tonne silver and 0.20 gram per tonne gold, while grab samples (CAR 39) of select material assayed up to 4300.0 grams per tonne silver, 1.80 grams per tonne gold, 5.556 per cent lead, 3.419 per cent zinc and 0.553 per cent copper (Property File - Valentine Gold Corp. [1987-07-28]: Property Evaluation of the Carmi Property).

The Observatory claim was staked in 1904 and it was reported that two or three carloads of ore would be ready for shipment that winter. The claim was Crown granted to J. Dale and A.S. Black in 1911. No further records are found until 1940, when 12 tonnes of ore were shipped by J. P. Gachain. A total of 6283 grams silver was recovered.