Wonderful collection of 4 books about vintage golf clubs and their trademarks/cleek marks.
American Golf Club Trademarks (1898-1930) by Patrick Kennedy (2nd Ed 1991)
Compendium of British Club Makers by Peter Georgiady #53/500 Signed by Author (1st Ed 1994)
Views and Reviews: Golf Clubs in the Trade Press by Peter Georgiady (1st Ed 1996)
Early United States Golf Clubs by AG Spalding, Wright & Ditson, Bridgeport, etc by JM Cooper (1994)