Posted By:
Steve M.
I will rank the ones by difficulty 1 for easiest through 10 for toughest for the sets that I am more familiar with:
5. A.C. Dietsche Postcards
5. American League Publishing Co. Postcards
6. Boston American Series Postcards
6. Gignon Postcards
6. H. M. Taylor Co. Postcards
6. Max Stein Postcards
4. Morgan Stationery Postcards
7. Novelty Cutlery Postcards
8. Pinkerton Photo Postcards
10. Rose Company Postcards
6. Sepia Postcards
4. Sporting News Postcards
7. Topping & Company Postcards
10. Ullman "Art Frame Series" Postcards
6. United States Publishing House Postcards
6. Wolverine News Postcards
I rank these in difficulty in collecting the entire set not on the basis of finding samples.
I note that you left my favorite set off the list. The 1906 Sporting Life (W601) set that I rank as 9.