A local store has a whole bunch of these on sale. If anybody is interested let me know and I can pick up some for you as long as they are available. Price: $2 USD per cup + shipping by canada post https://www.canadapost-postescanada.ca/ ... -rate.page
Once very common they've been getting harder to get in the past years. I'm guessing these might be from the 80s-90s. Heavy & unpretentious, I like them quite a bit, especially the smooth texture of the greyish off-white glaze.
Usable volume ~ 70ml, empty weight ~105g.
Last photo is for comparison with other common vintage cups.