They were distributed at one time by Air Arms.
The 8-32 is a really classic scope. By today's standards it's old fashioned as it's very long, and it has a gloss black finish.
The ret is as you describe, like a Christmas tree, and very useful.
The turrets are unusual being 1/12 click, compared to the 1/4 and 1/8 we are used to these days. Zeroing needs you to be brave and apply a good handful of clicks to see much POI shift.
They sell second hand for about £120.