Wow, I didn't expected Stevenson winning Leominster/Fitchburg if I'm reading the 1952 map correctly. From what I've occurred it's seem like a conservative Democrat districts.
Actually, that was his appeal.
Look at this map (courtesy of homelycooking)
Reagan won both of those despite winning by a lesser margin. Blackstone, MA voted for John Davis when literally no other town in Massachusetts did, yet gave Reagan 55% of the vote. (The first time it ever voted Republican for President, I believe.)
I meant more of a blue collar conservative district, since Stevenson was the anti blue collar Democrat that are the base in two cities. Blackstone is the same if they voted for Reagan, which means that they are more Democratic then liberal.