See scan for these nice, clean, intact blocks of no gum stamps, 20 stamps total.  I am not an expert on U.S. stamps and have a hard time detecting watermarks, could be #246?  They are from larger sheets that were stuck together and had to be soaked to separate.  See scan.  From a large collection of 19th Century and early 20th century I will be listing in coming months. Scans show mixed condition.  This collection has been sitting untouched for nearly 100 years.  The scans show them as they are, I identify them as best I can, I make no guaranteed claims as to identification or genuineness.