Brand : Paramount - (1942-1975)
Guitars shown below were made by Harmony and sold under the Paramount brand. It doesn't mean that all Paramount guitars were made by Harmony.

In 1934, the William L. Lange Company (New York) debuted the Paramount guitar series - and some of the models were built by the C.F. Martin guitar company. However, Lange´s company went out of business in the early 1940s. In the late 1940s, the Paramount guitar line was reintroduced and distributed by Gretsch & Brenner (source: Tom Wheeler, American Guitars).
But it looks like no later than 1942, a Paramount line of guitars were built by Harmony. A long time later, the brand was used again for some lower end models, at the end of the Harmony production time (ca 1975).

• Acoustic archtop

• Ideal - archtop - Acoustic archtop -  5

• 1447 - Challenger - Acoustic archtop - Natural -  15

• Challenger - Challenger - Acoustic archtop - Sunburst -  11 Special shaped straight f-holes. Carved top. - (based on Harmony H1463)

• Advance (1942) - Advance - Acoustic archtop - Black -  7 Wooden tailpiece indicates a wartime production. Stamped H993.

• Leader (1942) - Leader - Acoustic archtop - Sunburst -  41 Richly decorated guitar, with abalone on the headstock, on the fretboard, and all around the top. "P" logo in abalone on the wooden pickguard. Special straight f-holes. Spruce carved top, maple body. Stamped H1359 inside. - (based on Harmony H1307)

• Acoustic flatop

• Special - Flat top - grand concert - Acoustic flatop -  4 Compares to Harmony Vogue model C - (based on Harmony H1160)

• Special (1943) - Flat top - Acoustic flatop - Sunburst -  8

• PA610 (1973) - PA610 - Acoustic flatop - Natural -  7 Made in the seventies, similar to the last Stellas produced by Harmony in the USA. Faux-spruce top. Adjustable bridge. It looks like the old Paramount brand was used again in the seventies. Unknown distributor. - (based on Harmony H6128)

• PA612 (1973-1975) - PA612 - Acoustic flatop - Sunburst -  35 Made in the seventies, similar to the last Stella produced by Harmony in the USA. Adjustable plastic bridge. Plywood body. It looks like the Paramount brand was used again in the seventies. Unknown distributor. They usually are stamped HP612, but some are seen with HP610, 610 being the natural color model. - (based on Harmony H6130)

• PA630 (1975) - Flat top - Acoustic flatop - Natural -  9 late model with laminated top, and faux-spruce photo-finish

• HP634 (1975) - Flatop - Acoustic flatop - Natural -  6 Made in the seventies, based on the popular grand concert Harmony models (H162, H6362). A 12 string version was available. - (based on Harmony H6362)