How many movies have Orry-Kelly and Watson Downs collaborated on?

They have worked on 2 movies together! Their first movie together was Johnny Stool Pigeon (1949) and was their highest rated movie together. They have not worked together since The Lady Gambles (1949).

The Lady Gambles (1949)

Crew
Costume Design
Role
Lovett (uncredited)

Johnny Stool Pigeon (1949)

Crew
Costume Design
Role
Watchman (uncredited)