Slow day here in the desert and the heat is playing tricks on my gray matter, so allow me to digress: > <<I agree the StratoLiner was pretty ugly.>> Hmmm...was it pretty or ugly? The use of these words together negate their meaning. Perhaps "butt ugly" bests describes the StratoWhale! <<That's why some 707-100 series (eg. TWA), or 720s, did not have the spike as the -100 was the "domestic" version (with exceptions of course, Qantas comes to mind).>> The correct numbering of the 707 series are the 120, 220, 320 and 420. The first two are domestic and the latter, intercontinental (love that word!). However the 120 series were the first to cross the pond for Pan Am while they awaited their 320s. The Qantas B138 is a ten foot shortened version of the 120 series and had better range due to it's smaller size and weight. It became a hot rod (ask John Travolta) when upgraded to turbofans. The HF antenna was an option Boeing offered on all series (domestic and intercontinental) as well as the B720. The spike antenna also allowed such equipped aircraft to transport troops to God knows where if the military had such a need. And if you're really into trivial matters... AA so despised the 720 name they initially called 'em 707-720s. Upon upgrading to turbofan engines they became "707 Astrojets". I swear it's all true. If you want to wager, your last name better be Bennett!! RT Simpson Phoenix