This "Seven-Element" (the 'S' in Nikkor-S stands for Septem) is the definitive fast prime of the early Nikon F system. Introduced in 1962 to replace the slightly odd 5.8cm f/1.4, this lens became the standard against which all other SLR "normal" lenses were measured. This specific serial number (376344) identifies it as an early production unit, likely manufactured between late 1963 and early 1964. It features the early "Nippon Kogaku Japan" engraving, which was later changed to simply "Nikon." Known for its "dreamy" character and lower contrast when shot wide open at f/1.4, it sharpens up significantly by f/2.8. As a "Pre-AI" lens, it features the iconic "rabbit ears" meter coupling prong, making it a perfect period-correct match for your Nikon F Photomic FTn.