Nice brass safety lamp made by the Koehler Mfg. Co., of Marlboro, Mass., U.S.A. Height is 9" with glass chimney. This particular model locks and has a key that comes with it. The lamp appears to be unfired judging by the condition of the wick and its inner and outer gauzes. The only defect is an inscription etched into the base that says, Tools & Supplies, C.E.D. Since the etching is shallow, you may be able to buff it out. The lamp did spark when I tried it but that's the only testing I've done. No identifying number is on the top of the lamp although it could be a model 209 or variant.