The threes article and photos appeared over a series of years. Each shows a different model of the Zamboni Ice Resurfacer. You can learn more about the jeep-chassis models in this post.
MODEL E CJ-3B Version: Based on the ice-delivery-chain-system design on the front, I’d say this is a CJ-3B version of Model E. You can learn more about the CJ-3B versions here.

December 09, 1956, Boston Sunday Globe.
MODEL E CJ-5 Version: This model was the last one to include the jeep body, in this case a CJ-5 body.

March 09, 1955, The Gazette out of Montreal, Canada.
MODEL F: This photo and caption shows a good example of the final jeep-related Zamoni Ice Resurfacer.

December 06, 1957, The Record-Argus out of Greenville, Pennsylvania.