This Kenwood SO-2 TCXO is still in the box unused/uninstalled since new. This is the genuine Kenwood TCXO unit for use in Kenwood radios such as the TS-50S, TS-60S, TS-450S, TS-570S, TS-690S, TS-850S, TS-870S, and TS-950S. It has been stored indoors in a climate-controlled smoke-free home. Comes in the original box and packaging, with instructions. I don't believe it originally came with an adjusting tool (like the later SO-3), but if it did, it is no longer in the box. These TCXO units are getting pretty rare, especially in unused condition. $135 including shipping.