Indeed grahampos is correct regarding LH. Aircraft 410PE-417PE all came from LH.

As ewrcabincrew notes. the rear airstairs were a thing to behold. You never knew if they were going to work. Well....they would ALWAYS come down, they had an electric vs hydraulic motor, so that getting them retracted was never a given. Good thing there is a rubber bumper on the end of the belt loaders.
However, on more than one occasion in BUF, w took everyone off the the jetway, and boarded the outbound flight from the ramp, up the back stairs, as soon as the last inbound stepped off the plane. 118 off / 118 on and blocked out in 12 min. kind of like sausage. the end result was good, but you don;t want to know what went into it. Ahhhhh, the good old bad old days......What do you WANT for 19 bucks???

These aircraft came to CO with the acquiring of PE,and flew for a few years, even into the CAL Lite days. While MKE was not a "CAL Lite" city, it is possible that it was on that market to CLE for a short period. When the Bethune era came, the "junk jets" were one of the first planes to go.