Found another date coded part this weekend. Hope the photo is legible. The big gear for the timing chain has a circle with the initials NPC horizontally across the middle of it and a 6 and a 9 inside the circle above and below the NPC. There are 12 squares in a diamond within the circle around the NPC with dots in 4 of the squares. That makes the timing set an April 69 for a 6/3 EAD.
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