Welcome to the forum tatra4444

You have 34 nice used United States stamps from the 1910s-1960s.
All are common and would sell together for about $1.50 - $2.00.
I'm not sure if the 5c blue Washington (row 2, column 2) is used.
It is worth more if it is mint with gum.
I'll have to look these up:
El Salvador 10 centavos 1927 overprint (row 2, column 6).
Italy or Italian colony 20 Lire (row 3, column 3)
Germany 25+10 semipostal (row 4, column 2)