The dump has been sourced by me from an lumia 610 Prototype , and on BetaWiki its considered Beta of refresh 3.

YOU WILL NOT BE ABLE TO OPEN THIS DUMP NORMALLY AS ITS WP7 DUMP !!!
Uploaded by: acewayx
Uploaded on 5/5/2925
Source: Lumia 610 prtotoype
File info:
Name: DUMP.zip
Size: 442022150 bytes : 421 MiB
SHA1: cde658d3667097f05606322f08b3fb167a21b2d6