I think this would date from the period when Sellers was in Cyprus to film a movie called "Ghost in the Noonday Sun":
"Shortly after filming began, Peter Sellers began to lose confidence in the project and when Spike Milligan arrived on location to shoot his scenes, Sellers asked him to assess the footage that had been shot thus far. Milligan was unimpressed, which led to Sellers trying to convince Peter Medak to assist him in a scheme to get the production shut down. Medak refused to comply. Sellers subsequently became deliberately uncooperative and would often pretend to be sick, only to be later spotted water-skiing the same day. Sellers caused further upset by agreeing to shoot a cigarette commercial during one of the few off-days in the filming schedule, drafting in an unwilling Peter Medak to direct it, and then on the day refusing to be filmed holding the cigarette packet because he claimed to be the chairman of the Anti-Smoking League.[1]
Released several years after filming was wrapped and after Sellers' death (1980) in the 1980s, the film was semi-completed and released on VHS. The film never received a full cinematic release."
Sellers played a character called Dick Scratcher.....