Very interesting indeed – weird serial number which is usually a five digit number. West Bend built outboards for export. The motors they built for Seoars were Elgins and they added 571 in front of there model numbers. 3875 was a special 7.5 horse Elgin built in 1958. I went to work for Wards in 1962 to repare Gale built Sea Kings. Wards was notified that ’63 would be the last year that the Galesburg division would build outboards. Wards wrote West Bend to see about them building Ward’s Sea King and received an answer from Chrysler’s Marine devision. A group from Chrysler put on a service clinic to introduce us to our new "Hawthorn" built Sea Kings prefixed "VWB" from Chrysler. Chrysler’s service manual shows the 7.5 HP model only built from 1979 to 1984. The service illustrations look like your outboard . . . 🙄
