Linksys USB100M

EtherFast 10/100 Compact USB Network Adapter

USB100M serial numbers may begin solely with LBF1.

From a unit w/ a S/N of LBF104300264 (L seems to be the Billionton vendor code, BTW) ...
 * "122A121-0010 V1.1" is silkscreened on the back of the board.
 * A sticker with "820300138" printed on it is affixed to the back of the board.
 * The board is using a single 25.000 MHz crystal (marked "TXC EpOH", "25.000).