These were definitely NOT played by Greg Norman:
http://www.ebay.com/itm/RARE-SPALDING-TOP-FLITE-PROFESSIONAL-BIRD-ON-BALL-FORGED-IRONS-1-SW-VERY-NICE-/171040371721?pt=Golf_Clubs&hash=item27d2ccf409
http://www.ebay.com/itm/RARE-SPALDING-TOP-FLITE-PROFESSIONAL-BIRD-ON-BALL-FORGED-IRONS-1-SW-VERY-NICE-/171040371721?pt=Golf_Clubs&hash=item27d2ccf409