This camera comes in perfect working condition, with new light seals and lens filter. OM-2n MD The OM-2n MD, manufactured from 1979 to 1984, has a lower-case "n" engraved next to the model number on the front plate at the rewind lever and on the top plate, to the left of the prism. Additionally, the re-set function was moved to the top of the camera via the power-switch and the word "Reset" is engraved next to the word "Check" on the top plate of the camera. The "n" model had a new, re-contoured advance lever which had smoother, rounded edges as opposed to the OM-2 and OM-2MD's advance lever's slimmer and sharper edges. The OM-2n MD used hot shoe 4 with two additional contacts above the main central sync point. This shoe used two small pins to make contact with the camera circuitry. For this purpose an OM-2n MD will have the large securing threaded recess used for shoe 1 on the older OM-2 MD plus two smaller recesses for the added contacts visible on the rear of the prism above the viewfinder. The flash shoes are not backwardly interchangeable between models. The OM-2n MD added, via the shoe 4 circuitry, the following features to the OM-2 MD: A flash charge-ready light in the viewfinder and correct flash exposure confirmation by flashing this same green LED after exposure. The "n" also had a contact inside the film chamber for the Recordata back. Finally, if used with a T-Series flash, the flash and shutter would sync at "X" setting regardless of what position the sync switch around the pc-socket was set to.