Is the gentleman on the right Amund Olson, husband of Bertha?
Can anyone identify the make and model of the car? Bertha died in 1904, so that narrows the search dramatically to the Veteran era. This car on flickr appears to be similar.
Bertha Marie Tonnesdatter Olson (1837-1904) is 3rd great-grandmother of MKS in the Wetherbee branch.
References:
[1] KMS Family Genealogy Digital Archive, Joyce Elaine Wetherbee Johnson collection (photograph).