Sharing a movement with my grandpa, 43 years later

My grandpa died when I was a kid, and I discovered his old Seiko 7006-7169 in a box last year. It was made in May 1973. Soon after, I purchased the Orient Mako USA with some summer internship money, and it's my favorite watch.

Last week I was wearing the Seiko. I was curious about the 7006 movement. According to watch-wiki.net, it was the budget automatic movement from the early 70s (eventually replaced by the 7S series, though it's not clear whether the 700x and 7Sxx lines are related design-wise). It had no hacking, no hand-winding, and a quick-set date but NOT a quick-set day.

But I also found out that Orient licensed the Seiko 7006 (this exact movement, not the whole 700x series) in the early 70s for their automatic line. The result - Orient cal. 46943 - has been in production with minimal changes ever since. And guess what? That's the movement in the Orient Mako! You can even see the lineage: the 7006 has no quick-set day, right? Well the Mako only has quick-set day through a pusher button that Orient added to the design after the fact.

I found a remarkable connection to my ancestry through these watches, and that makes them both even more special to me!

Very nice man! I own the blue ray and love it! Really awesome knowing you and your grandpa share a connection that was a couple generations apart.