Condition 97%. Superb, mint- example of this rare early 5cm F2 standard lens from Nikon in pre Ai mount. This is the Pat Pending version of the S lens (S standing for Sept or 7 element). serial number is 551188, being the 16,371th lens of a production run of 47,073 units made between 1960-63, so this likely 1961. Sought after by collectors and users alike this is a rare and desirable lens. Clean optics. Smooth focus and snappy aperture. Front & rear caps.