@AlanMunn -- Here's the schedule for the series:
museumconcerts.org/chamber-concerts.html The cello in the second picture is the one played; it's absolutely gorgeous, and doesn't show its age (built in 1755; definitely gamba style, no extender to attach it to the floor). Concert took place in the "great room" of a local church, very much a chamber environment, intimate and not overly formal. There were actually a couple of phone interruptions, but between selections, thank goodness.