Mercury D19G

Overview
"2050501312" and "1908" is silkscreened on the board.

Forum threads

 * Mercury D19G AC1900 Gigabit Router on AC|WiFi (CN)
 * TP-LINK TL-WDR7660 Gigabit Router on AC|WiFi (CN)
 * TP-LINK TL-WDR7660 Disassembled on AC|WiFi (CN)
 * CPU: MTK (TP-LINK) TP1900BN @1.2GHz ARM WiSoC