Rue, they're both two-toned. I bet they came from the same place? Looks like someone stripped the tops, but didn't want to deal with doing the intricate bases. Sorry, can't help with the id.
Violadamlore- This is a very difficult to understand explanation of what/where the "delta" is; I doubt that it resolved Derek Law's question. Can you give it another "go"?
My admittedly untrained eye tells me someone put a horrendous replacement neck/head on an otherwise decent box, and finished the whole with a terrible black "antiqueing" treatment.
Possibly recent high sales are a result of the current inflationary trend- folks are investing more in physical items which tend to hold value, rather than leave money in the stock market or banks where it is steadily losing value.
I believe this is actually 4-ply purfling, with all plys made equal width. Two white center plys were used to achieve a wider white "center" purfling. The technique was used because it was easier/faster to make all purfling strips the same width.
Perhaps of more interest might be the purfling. Use of the double white center strips could point to certain regional origins, and even possibly particular makers if not "schools". Do you know the origin or maker of this cello?