Red seals on bills printed from 1928 to 1966 indicate they're United States Notes. The color distinguishes them from silver certificates (blue) and Federal Reserve Notes (green). US Notes were mostly issued as $2 and $5 bills but at one time or another nearly every denomination had at least one series of US Notes.
US Notes were issued directly by the federal government rather than through the Federal Reserve System. The two kinds of currency served the same purpose so production of US Notes was suspended in 1971 to save on printing and distribution costs.
Yes, many millions of them. All US $2 bills were printed as red-seal US Notes from 1928 to 1963. Most $2 bills issued before that also had red seals but weren't necessarily US Notes.
No US $2 bills were printed with yellow seals. However, up till 1963 most were issued as US Notes with red seals and in the 19th century some $2 bills had brown seals. Either of these could have changed color due to age or exposure to chemicals.
Please check your bills again and post a new, separate question for each date. The only dates in that range are 1999, 2001, 2003, 2006, and 2009, and all of them have green seals. The last red-seal $100 bills were dated 1966.
Please check your bill again. There were no US bills dated 1927. The last large-size $1 bills with red seals were in the 1923 series.
1953 US $5 bills were printed with red seals and as silver certificates but they're not the same. The bills with red seals were United States Notes while the silver certificates had blue seals. Each type is identified by the banner across the top of the bill's front side. There's more information at the Related Question.
1953 US $5 bills were printed with red seals and as silver certificates but they're not the same. The bills with red seals were United States Notes while the silver certificates had blue seals. Each type is identified by the banner across the top of the bill's front side. There's more information at the Related Questions
Yes, but the last ones were printed in 1896. Many subsequent $2 bills also had red seals but they weren't silver certificates. From 1928 to 1963 all US $2 bills were issued as United States Notes which had red seals. Since 1976 all $2 bills have been green-seal Federal Reserve Notes.
Please check your bill again and post a new, separate question. There were no red-seal $50 bills dated 1922. The last red-seal $50 bills carried a 1914 date, while 1929 bills had brown seals.
Red-seal $2 bills were issued from 1862 to 1963 so there are lots of different dates and series combinations. There's a full list including values at the Related Link. In general red seals indicated that the bills were United States Notes, a form of currency issued directly by the Federal Government instead of by the central bank. Some older silver certificates and Treasury notes also used red seals before colors were standardized in the 1920s.
Zero. There are no red dollar bills.
The U.S. didn't print any bills dated 1972, and the last $2 bills with red seals were dated 1963. Please check again and post a new, separate question.
U. S. paper money with a red seal (regardless of denomination) are United States Notes (see the link to an encyclopedia article). Bills now being printed are all Federal Reserve Notes with green seals, and some older bills are Silver Certificates with blue.