This instrument was cut down in size sometime around 1800.
The History of the Viola, Volume 1, Maurice W. Riley, The History of the Viola, Volume I
"His [William Primrose's] father owned several fine instruments, including a c.1600 Brothers Amati viola which was kept locked in a cupboard. This must have been part of its attraction. Willie, as the family called him, described his naughty moments thus: 'As a youngster, when he [father] wasn't around, I found a way to open the latch on the cupboard where the Amati was kept and played it with considerable satisfaction. I preferred its sound to the sound of the violin.'"
No time for snobbery, Claudine Bigelow, The Strad, August, 2004, London
"Its good state of preservation spikes the spurious rumor that it suffered injury in a mishap last year. Actually, it was Mr. Primrose's Moennig viola which was slightly damaged."
Viola-of-the-Month, String Player, Vol. 2, No. 2