> Old growth basically means the shaftwood is over 20 years old. On the other hand,some people are referring to wood brought up as part of the Timeless Timber project. These are submerged logs that have been sitting on the bottom of the Great Lakes,Superior in particular. These logs are 4-500 years old,dropped during logging operations,and the technology to retrieve them only became available maybe 7-8 years ago.
The wood itself is "changed" due to the super-cold temps. Some like it for shafts,some don't. There is a theory that Stradivari,and before him Guanieri,treated their violin woods in cold water. Hope this helps,Tommy D.