Found on floppy labelled "Xircom Pocket Ethernet Adapter Network Drivers"
"Version 3.03 (901005) disk 1 of 1"
Readme file gives the date as March 9, 1990. This is probably the for Xircom's first pocket ethernet adapter, since the other disk I am going to upload mentions that it is for the Pocket Ethernet Adapter II, has a lower release # and a later date.
File is a self extracting Stuffit file.