In the episode “Home Movies” S3, 3/1/54 Lucy, Ethel and Fred film their own western home movie. Lucy uses  a Bell & Howell 200 movie camera. It appears that when Lucy later edits her film, it is a Bell & Howell / B&H 75-175-A Editor film Type AN-1.

Source: http://www.ebay.com/itm/Bell-Howell-B-H-AN-1-Film-Editor-/262273085101