Hi @Edie Nelson ,
I don’t know how accurate this will be but according to this parts supplier the part number for the owner manual for the washer is MFL67737652.
If you click on the image of the manual in the link you will see that it is dated 01/05/2015.
Either it is the 5th January 2015 or the 1st May 2015, depending on the location where the date was written, so it may be around that time. (the link to the manual is from Kuwait which uses the UK date system of day first, followed by month but it may have come from the USA to Kuwait, if you get my meaning)
The washer is a rebadged LG washer (or perhaps a made for Kenmore by LG, washer) as all of the parts are LG parts.
Hopefully this is of some help