Gilbert Catalog
Price in 1948: Unlisted
Prevent track sections from pulling apart, even if track is not tacked to floor. Easily inserted in end ties of adjoining track sections.

Price in 1949: $0.30
Not illustrated. Keeps track sections from separating. Box of 14, $.30. Denver and west, $.32.

Price in 1951: Unlisted
(Prevents tracks from separating while trains are running).

Price in 1952: Unlisted
Track Lock (Prevents tracks from separating while trains are running).

Price in 1953: $0.30
Track Lock (Prevents tracks from separating while trains are running).

Price in 1954: $0.30
Prevents tracks from separating while trains are running.