Clasic wood frame sizes
This appears to be a Belgium model from the paint job...see inside hoop bottom center for country stamp...Taiwan, Japan, Belgium , ect... further, almost all classic wood ovals are close to 65 sq inch, not 75...remember 85 is Midsize !....Also some diagonal frames were designed in a narrower top head shape, more diamond shaped than oval as diagonal strings put enormous stress at the more rounded stiffer corners of a true oval, sometimes causing cracks because of a lack of flexibility, the flatter corners of a diamond allow more flex...Diagonal stinging was really only done for 1 major reason...to but more bite on the ball for top spin and back spin, as all strings, both mains and crosses are making an angular bite into the ball, where as regular strings only give a solid bite to the vertical mains with the crosses just sliding off the ball.... there has never been any reports I am aware of that claim anything else....no greater power, nor control....regards,