TP-LINK TL-WDR4310

Overview
"2050500224 Rev:1.0" is silkscreened on the board.

See also the TP-LINK TL-WDR4300 which shares the same hardware. This device does, however, have a different stock firmware header.

Links of Interest
Technical data Images TP-Link TL-WDR4310 v1.0 First steps and bootlogs - OpenWrt forums

On the OpenWrt wiki Working build on the DD-WRT forums