It looks like the cask strength "105" has appeared over the years in various guises, some with age statements other without.
I was lucky enough to get hold of a bottle of the 20 YO edition. I bought it around 3 years ago if memory serves me well. It was a lovely drop, loads of rich flavours and nice deep colour to it.
https://www.masterofmalt.com/whiskies/glenfarclas/glenfarclas-105-20-year-old-whisky/Glenfarclas is one of my "go to" drams that is always a winner. In my opinion they still offer very good value for money.
I managed to drop in to see the distillery while on the bike last year. Great distillery tour and great roads if you are ever up Speyside way. I got creative and made some space in the panniers to take a bottle home with me, slainte!