model 110.680890A00...serial 02673M81.....comes up as serial number does not conform to known date patterns....is there a few numbers missing that were not seeing?...
the second one, we need a serial number in order to date it...
Older WP/KM serials format had the factory/year/week characters at the end instead of the beginning. "Modern" syntax for 02673 M81 would be M81(x)02673. Normally there are two numbers for the week ... is there another number 0 to 9 in place of the x?