[Ger-Poland-Volhynia] microfilms

[Eduardo Kommers]

Hello everyone,

I got a film number of my ancestor on SGGEE.ORG and tried to search it on 
"familysearch.org". The number is 1884098/1.
I type 1884098/1 and there aren't results. Than I type only 1884098 (without 
"/1" in the end)... this way is OK. It shows all the informations about the 
film.
Could anyone tell me why? What does "/1" mean?

Thanks

Eduardo Kommers