Hi,
I have 10 issues of 1973 Popular Mechanics magazines with some nice car pictures.    Feb, April, May, June, July & Nov have some degree of water damage  but very readable, see specific comment's below..  Different articles and ads are noted below
  1. February -73 -Mercury Montego color ad (watermarked), 73 Dodge Polara color ad (watermarked)   
  2. March 73- No water damage, Front and back cover good, inside pages good,73 Plymouth gold duster color ad, &3 Ford Maverick color ad, 73 Ford truck color ad, 73 Pontiac Grand Am article 
  3. April 73- - Some significant water marking on all pages but very readable,73 Plymouth gold duster color ad(watermarked) ,73 Ford truck color ad (ok), 73 AMC Hornet color ad (watermarked)
  4. May 73- - Some significant water marking on all pages but very readable , 73 Mercury comet article, 73 Ford truck color ad (watermarked a little), 73 Plymouth gold duster color ad(watermarked)
  5. June  73-Some water marking (not as bad as others) on all pages but very readable, 73 Ford truck color ad(watermarked a little), 73 Buick Electra article, 73 Plymouth Satellite article, 73 Chevy Caprice sport sedan colr ad (watermarked)
  6. July 73- -  Some water marking (not as bad as others) on all pages but very readable, 73 Ford truck color ad(watermarked a little),73 Ranchero vs El Camino article, 73 Impala color ad (ok)
  7. September  73-- No water damage, Front and back cover good, inside pages good,
  8. October 73-- No water damage, Front and back cover good, inside pages good, 74 new car issue with many pictures of the new cars such as the 74 Ford Mustang, 74 Maverick color ad, 74 Plymouth Duster color ad (red/white stripe)
  9. November 73- -Some water marking (not as bad as others) on some pages but very readable , 74 Mercury cougar XR-7 color ad (good), 74 Malibu ad, 74 Plymouth Satellite wagon color ad, 74 Torino 2 page color ad, 74 Vega GT color ad
  10. December 73--Front and back cover good, inside pages good, 74 Maverick color ad