This sale is for an excellent vintage piece of diving history. This is a battery powered transistor telephone 191 manufactured by the Morse Diving Equipment Company in Boston Mass. This is the same company that made the iconic brass diving helmets. This unit is in amazing condition. It still has the original batteries in it. I have not tested it, so it is being sold as is.It has an excellent Morse brass ID plate as well as a plate that is stamped USCEC which stands for the United States Civil Engineering Corp.Dimensions: 13 1/8\" x 8 7/8\" x 7\"Please use the pictures to determine the actual condition of the telephone.This would make an excellent addition to any vintage Diving collection. I can take additional pictures if needed.Please contact me with any questions that you may have before offerding.Payment is due within 5 days of the sales closing.Buyer must notify me within 24 hours of receiving the item if it is damaged otherwise no return is accepted.Please contact me if the shipping charge calculated seems excessive. Thank you!