Today I made a minor upgrade to my Apple 1. One part that had been silently nagging me on my Apple 1 was the 555 used in the video section. I made a great effort to find all Signetics parts for my Apple 1. Not just Signetics parts, but vintage Signetics parts. I had succeeded in doing so, and was able to find 1976 or earlier in every case but the 555. For the 555 I had to settle for 1988. The other day I lucked out and found a 1976 NE555V for sale on eBay Germany. I snatched it up and now it lives happily in my Apple 1.