This is a Benrus Model BU 17 Jewel Watch Movement. This watch came from a watchmaker's parts inventory labeled as Benrus BU / Recta M. I wound this watch and it and ran for a full day. The movement is complete as the photos show. I am trying to sell off his inventory of watches and parts so these are being offered AS IS. If you have any questions let me know and I'll get right back to you.