Tens of musical manuscripts, mostly in Lachman's handwriting, some with his own tunes and others with mention of composer's name, such as Lavandovsky and Aharon Freidman. It is possible that some of the handwritings are not Lachman's.
About 150 leaves from various periods, all with Jewish tunes.
The collection was not researched musically, but it can be assumed that some of its tunes were never publicized.
Sizes and conditions vary.