Rechecking my finds today and realised that I finally qualified for this one. I found the cache container back on 22nd July, earlier this year, so it just remained to add this found log.
PS. Seems appropriate to add a favorite point!
PPS: See my web page http://www.15ddv.me.uk/geo/chal/metal_bijou_challenges.html#MB04 for details of my qualifying caches.