Encoders

Can anyone here make an educated guess about the resolution
of some shaft angle encoders by the part number? They were
made by Sequential Information Systems Inc. which as far as
I can tell was bought up by someone who has since gone out
of business. Anyway the numbers are as follows

Mod. 15A1024IDZE1-5V-H1F1D1B2T
P/N PS110002

I know they are 5V, but thats about it.

Bill