I found a very old book written in the Hebrew language. At the bottom of the title page it is written " Machsor Tom. I". It was printed in Austria by Jos. Schlesinger Librairie. I searched on line but could not find any reference to Machsor Tom. I; I have found II and VII. I presume it is a prayer book for special occasions. Does anyone know for what festival it is/was used?
As Noach has pointed out, Tom. stands for Latin "tomus", volume, thus you have volume one of a mahzor, or holiday prayer book. The Schlesingers were a well-known Austro-Hungarian family whose printing firm specialized in printing prayerbooks (see here and here). If you can post a scan of the title page we will be able to tell you more about it and what it was for.