Here are some photos I have taken of Kaman HH-43F Huskie helicopter variants, two of which were on display at the Pima Air Museum in Tucson, Ariz. Note that the Marine OH-43D version has three tail fins, while the HH-43F version has four tail fins with an exhaust pipe extending through the middle. There also is a nice display in the NMoUSAF of an Air Force Huskie performing a rescue mission. But the coolest treat was seeing a Huskie in flight during the 2018 air show at the Olympic Flight Museum.
Tillamook has an example of the Kaman HTK-1 that eventually developed into the Huskie.