When the Head/AMF first came out with the Head Vilas racquet (woodie), it seems that this was the turning point in the future of things to come in terms of racquet technology....a "game changer" so to speak. Later, Head came out with another open throated racquet, the Arthur Ashe model, while other companies such as Yamaha followed suit introducing their own line, the YFG 20, 30, 50 models. Later Prince came out with the oversize open throat, "Classic". Today, all racquets are open throat. Researching the internet, I happen to come upon the earliest version of an open throat racquet from 1929. http://www.driftwaycollection.com/rackets/open_throat.html I'm just wondering why companies such as Wilson, Spalding, Tad Davis, Bancroft and others such as Donnay didn't adopt this technology any earlier? Tennis history buff, please chime in. Thanks!