Three OLYMPUS film camera WINDERS WINDER 1: 1 unit WINDER 2: 2 units These winders can be attached to Olympus film cameras such as the OM-1 (MD specification), OM-2, OM-10/20/30/40, etc. WINDER 1 allows for single-frame advance and shutter release. WINDER 2 allows for both single-frame advance and shutter release, as well as continuous advance and shutter release. Operation has been confirmed on all three units using an OM-10. Please check the photos for the exterior condition, as there is rust and paint peeling. There are no signs of battery leakage in the battery compartments of any of the three units. Included items: Everything shown in the first photo. Batteries are not included. Please understand that these are old items before purchasing.