lzmainfo(1) on FreeBSD
The text b6f7a8659827, as FreeBSD 10.0-RELEASE, FreeBSD 9.2-RELEASE, FreeBSD 9.1-RELEASE, FreeBSD 9.0-RELEASE, FreeBSD 8.4-RELEASE, FreeBSD 8.3-RELEASE, FreeBSD 8.2-RELEASE shipped it.
show information stored in the .lzma file header