Linksys WAP54G v1.1

Overview
OEM Gemtek WX5541 (WX5541_V00)

WAP54G v1.1 serial numbers appear to begin with MDG1.

Links of Interest
Some WAP54G v1.1s may instead use WX5561 boards, like the SparkLAN WX-6800.

WAP54G series on the OpenWrt wiki On the DD-WRT wiki

Flashing dd-wrt

 * Flashing Linksys WAP54G All Versions

Pictures
FCCID