Knight-Kit tuner of the KG series, usually found with the KG-870 unit.
Kit-built equipment: assembly quality varies wildly from builder to builder, and an unbuilt kit in its box is worth several times a working assembled unit. Check for the original manual, template and the factory-wired boards (Dynaco/Eico solid-state kits came with pre-assembled boards).
Marks that can be entered for this maker: Model / catalogue number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code.
The introduction year is not documented, so the model narrows nothing.
Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.
Evidence: Nostalgic Kits Central — Allied/Knight catalogues · SMECC — Knight-Kit catalogue archive