Apart from Australia & Spain, did any other countries issue coins depicting the official Year of Older Persons Logo?
Canada did issue a Commemorative coin, but did not use the Logo.
Australia 1999 $1 KM#405 - Circulating commemorative coin
Spain 1999 100 Pesetas KM#1006 - Circulating commemorative coin
Canada 1999 1 Dollar KM#355 (Silver) – Non circulating coin
Sort of hard to believe no other countries participated, not that I can find anyhow.
Just had a quick search and looks like there's just the three you mentioned above. That's a bit odd as I would have thought more countries would have be then most countries including our own don't seem to care about older people :(