I am not sure when I bought it. I'd guess late 2012 but I could be wrong. 1376 hours.
The first six digits of the serial number is the day the unit was made.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1