Even though Armstrong 4008 USA is stamped on the bell, I bet this instrument was made by Amati in Czechoslovakia. The key work looks just like the Artley wooden instrument I reviewed, and the printing on the bell also looks like that instrument. Another Amati instrument is the Forte.
Bore: 14.8 at top of left hand joint, 14.55 at the bottom.
I am comparing intonation on this with the Forte.
This instrument is almost as good as the standard model Vitos. (The V40 should be great, but I haven't tried one.) This is a good beginner clarinet and is sturdily made, so it would be good for use in marching bands.
Showing sturdy crow's foot key.