The Bauer T 5xx series are a line of higly reliable projectors with dubbing features and popular for their low traction noise. Also known as Bauer studio series and quite expensive they were addressing the prosumer faction when built in 1977. Reel size > 240. Lens 1:1,2/15,5-28mm. Speeds 1+18+24+R. Bulb 15V/150W halogen. Manual provided by Erkan Umut, Istanbul, Turkey.