Was curious, Googled telephone museum Springfield. Found a couple of 1 star reviews.
https://www.yelp.com/biz/oliver-parks-telephone-museum-springfield
The latest, from 2011 mentions it's closed. Now I'm more curious. Has it been closed this long and it's still sitting empty with a sign that says the museum closed? Did you just feel sorry for me but, couldn't find it so you found the pics on the internet? Maybe the Parks family has a long history of getting in a snit and asking for their phones back, then they think of all the joy the telephone museum brings to people and, they reopen it?