These are Parker 61 Pens from the 1960s They all have rolled gold caps and gold nibs. The unusual thing about these pens was the revolutionary capillary filling system that was invented in order to make the pen as easy to refill as a ball pen, which was becoming increasingly competitive. Unfortunately this filling system was unreliable if left unused for long periods as the ink would dry out and was difficult to clean. So, the pen that was intended to change the world (of pens) slid in to obscurity and is now of interest only to collectors