Masur Birch 22-34
If a piece shows two figure grades ie: 3A/4A it means that it is in between those grades and the first grade listed is closer to correct.
Masur Birch is a highly desired patterned wood from Finland and Belarus mostly. Recent research (2017) has reversed the previous belief that these patterns are caused by beetle attack. Studies have shown that the trees that have these patterns are genetically different from those that don't have patterns. This is a process of natural growth in the tree rather then a response to insect attack. The quality of patterns in these pieces is far above average and required very selective cutting techniques to get this kind of appearance. Notes: There may be a long-term problem getting more, the source country Belarus is in a political crisis.