Below are some of my domestic use 2nd Bureau postal history covers. I have listed various rates and services provided by the United States Postal Service in 1902 through 1909. There were few rate changes during this period, thus relatively easy to know which stamps were used for a given rate.

1st Class Rate (2¢ / oz with use of carrier 1¢ / oz non-carrier mail)

1 ounce (carrier mail)

view cover -- franked with a pair of 1¢ booklet pair Franklins
view cover -- franked with an imperforate 2¢

2 ounce letter

view cover -- solo franking with 4¢ Grant

3 ounce letter

view cover -- solo franking with 6¢ Garfield

4 ounce letter

view cover -- solo franking with 8¢ Martha Washington

Registered Mail (8¢ registry fee)

1 ounce registered letter

view cover -- common franking with 8¢ Martha Washington and 2¢ Washington
view cover -- solo franking with 10¢ Webster
view cover -- franked with five 2¢ Washingtons
view cover -- RFD strike on two 4¢ Grants and one 2¢ stamp
view cover -- penalty envelope franked with 8¢ Martha Washington

2 ounce letter

view cover -- pair of 6¢ Grants, an uncommon franking.
view cover -- pair of 5¢ Lincolns on penalty envelope.

3 ounce letter

view cover -- 13¢ Harrison and 1¢ Franklin

4 ounce letter

view cover -- pair of 8¢ Martha Washingtons
view cover -- colorful franking with 5¢ and 6¢ stamps
view cover -- 15¢ and a 1¢ commemorative

Special Delivery (10¢ fee)

1 ounce letter

view cover -- franked with a strip of five 2¢ Washington shield stamps

2 ounce letter

view cover -- franked with a strip of five 3¢ Jackson stamps

Both Services (Registry and Special Delivery)

1 ounce letter

view cover -- cover franked with 10¢ Webster and 1902 special delivery stamp

Post Cards (1¢ domestic rate)

post card -- early "divided back" use
leather card -- charged letter rate (I believe by strict rules, the printed matter rate for postcards would not apply to leather "card". Though it is common to see both 1¢ and 2¢ franking on leather cards.)
re-mailed post card -- post card sent and re-sent to four separate locations.
bisect stamp -- 2¢ bisect stamp on domestic penny post card

2nd Class Mail / Newspapers and Magazines (1¢ / 4 oz)

view cover -- Cover placed on stack of magazines.

 

3rd Class Mail / Printed Matter (1¢ / 2 oz)

less than 2 ounces

view cover -- common 1¢ franking
view cover -- Valentine's Day card

less than 4 ounces

view cover -- redirected wrapper

4th Class Mail / Samples and Merchandise (1¢ / 1 oz)

less than 1 ounce

view cover -- 1¢ solo franking

less than 3 ounces

view cover -- 3¢ solo franking from photographer

less than 5 ounces

view cover -- 5¢ solo franking on tag