Gilbert Catalog
Price in 1946: Unlisted
18 Volts, Round Red Glass, 9/16" diameter. 3 per package.

Price in 1947: Unlisted
18 Volts, Round Red Glass, 9/16" diameter. 3 per package.

Price in 1948: Unlisted
18 Volts, Round Red Glass, 9/16" diameter. 3 per package.

Price in 1949: $0.75
18 Volts, Round Red Glass, 9/16" diameter. 3 per package.