That's interesting about the facings. One thing I've always found interesting about 18th century facings, is that they parallel how, in the 20th century, lapels got very wide in the 1920s and '30s, to become really narrow by the early '60s. When watching 18th century costume movies, I always keep an eye on the facing/cuff size on the coats to see if it matches up with the decade. Some films get it right, but a lot of films get it wrong. Silly costumers! ("Farinelli" is particularly awful for mistakes like that. It's set in the 1730s, but the main character walks around in 1780s suits. AND he has a mullet. Ugh!)
Anyway, thanks for the heads up on the sash- I'll be sure to remember that now!