Great clock Dave.
I never ever made a clock. I did make frequency counter that did look very similar in construction to your clock.
I love veroboard
Great stashes of old components, brings back memories.
My first ever job was as an electronics service engineer for IBM. I also collected many 7400 series chips from old faulty boards. The big problem was that IBM used to part number almost everything back in the eighties.
Although it may have been a standard TI 7401 TTL chip it would
only have an IBM part number on it. I could never remember all the IBM seven digit part numbers so a translation list was a must.
And yes, everything was part numbered especially for IBM, from SnapOn tools to Tektronics scopes.
And my favourite CMOS chip that I used everywhere was the 4017 (Not the 4026. Sorry Dave.)
I used to make blinky LED lights for my scale model projects. 4017 rocks...
Alien