This issue is a variant of Captain America (Marvel, 1968 series) #198 [25c price variant]. There exist further variants.
in Capitaine America (Editions Héritage, 1970 series) #58 ([June 1976])
in Captain America & The Falcon: Madbomb (Marvel, 2004 series) #[nn] (2004)
in Marvel Gold: Capitán América: La Saga de la Bomba Loca (Panini España, 2011 series) #[nn] (Junio 2011)
in Captain America (Arédit-Artima, 1979 series) #18The Madbomb Part 6.
Marvel Value Stamp Series B 91: Silver Surfer (by Jack Kirby)
Captain America and Falcon illo from #196 page 7 panel 5