SH4739  Sheaffer Prototype Model Reminder Clip Pen, no markings at all. Ca. 1960s. Sleek and reflective gun metal finish on cap and barrel, bright steel reminder clip with white dot at top of clip. Measures 5 1/8 inches long. Original Sheaffer working refill inside with the wingtop to work properly with the reminder clip. Mint condition. (1 avail)