This is from a large collection of violin tonewood acquired from a retired violin maker in upstate NY well over 30 years ago.  There is no telling how long the maker had the wood before I acquired it.  Country of origin: unknown.  

11 Cello bass bars.  

LENGTH:
1 @ 762 mm
3 @ 825 mm
2@ 845 mm
1 @ 850 mm
2 @ 860 mm
1 @ 870 mm

WIDTH: 
15-18 mm

HEIGHT: 
35 - 39 mm.