I also love the amount of information you can glean from, and the memories triggered by, something as simple as the price label on this thread. 6 1/2p. Suddenly I'm back in the sweet shop spending my few 1/2 pennies carefully. This must be older than me though; they stopped clarifying theses were decimal pence being charged some way before I could ever read a price label.
I've never seen linen thread before - so strong though - it makes perfect sense. I'll be using it next time my coat button comes off (I've sewed it on three or four times already!) and my thoughts will be of a different time.