Is a 69 wedge illegal in golf?

Is a 69 wedge illegal in golf, there is no 69 degree wedge that is illegal per se under Rules of Golf by R&A and USGA, but a wedge with 69 degrees of loft would be extremely high loft and likely non-conforming because maximum practical loft is about 64 degrees, and most wedges are 46 to 62 degrees. Under rules, club must have loft less than 90 degrees and meet specifications for groove width, depth and face, so a 69 degree wedge would be legal if it meets groove rules and is not excessively concave, but it would be impractical and may not conform to equipment rules if grooves non-conforming. What is illegal is wedge with non-conforming grooves, such as square grooves that give excessive spin, which were banned in 2010, or wedge with altered face like adding texture. There is no rule banning specific loft like 69, but pro golfers rarely use over 64 degrees because difficult to control. There is also joke that 69 wedge is illegal because number is funny, but not official. So a 69 degree wedge is not illegal by loft alone, but would be unusual and may be non-conforming if grooves do not meet 2010 groove regulations requiring less spin. If you have 69 wedge that conforms to USGA list of conforming clubs, it is legal to use in competition. Most amateurs use 56 and 60 degree wedges.