No exact dates unfortunately (late eighities up to 1994?) but anyway some nice 464 pics....
https://www.maths.tcd.ie/~iedowse/projects.html
Ooops!
I see this was posted about back in 2012:
https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-464-mod-oldie-but-a-goodie/
Eh, always nice to revisit interesting stuff😊
Nice to see that it's still online...