The WP Bench website has apparently registered its first instance of the Nokia Lumia 610 in the wild running the latest build of Windows Phone Tango, v8757.
However, WMpoweruser, which published the report, warns that WP Bench could be spoofed, and that we'd probably have to wait until next week's Mobile World Congress event in Barcelona to find out more.
The Lumia 610 is expected to be the cheapest Windows Phone 7 handset on the market when it launches. The Nokia Lumia 710 and the Nokia Lumia 800, which were both launched last year, currently retail for around £200 and £350 respectively.
Both Windows-based smartphones run on a single core Qualcomm Snapdragon SoC clocked at 1.4GHz and we suspect shoving a slower chip into the handset might be a straight forward way of cutting the bill of material.
Likewise, expect the Lumia 610 to have a smaller screen (3.5-inch WVGA), less onboard storage (4GB rather than 8GB or 16GB), a camera sensor with a lower pixel count (3.2-megapixel) and possibly a battery with a lower rating.