Hi Kevin,
Yes, my thought exactly.
It resembles the Monart weight pattern n. 13 (of Scotland glass coded labels), except that mine has an extra cane in the middle of the loops. And I think you are right, it is very close to the garland pattern. For the sake of completion, I saw a similar PY weight at the Perth museum last year.
In my opinion, the weight is from the Caithness period - the canes, the translucent dark (olive) green ground and the flat polished base are all indications of that period to me. The weight is 3 inches (width) by 2.3 inches (height).
I will try and take pictures of the side and base tomorrow.
SophieB