This one has an unusual dial and an interesting hand set – from August 1969, case number is 4-521226:

Still on its original ‘C’ signed bracelet, it’s running well:

This one has been ‘Featured’ so more info can be found here: https://sweep-hand.org/2013/01/05/this-weeks-featured-watch-44-the-crystal-seven-custom-23-jewels-4-521226y/