The Kansas City designation would indicate your bill is most likely a Federal Reserve Note that was printed as part of the National Currency series. Please see the question "What is the value of a 1929 US 20 dollar Federal Reserve Note?" for more information.
A brown seal was used on an issue called National Currency. This type of note was not widely issued, but they remain common in collections. Your note might retail for $25 to $35 depending on its condition.
The Hawaiian brown seal $1.00 , $5.00 & $20.00 were issued in the Hawaiin Islands 1942-1944 and were the only currency used. The reason was to guard against invasion contamination of US currency.
No US $20 gold certificates were dated 1929. All 1929 bills were issued as National Currency Notes and had brown seals. Please see the Related Question for more information.
If the bill has a brown seal and the words National Currency, it's worth about $15 (retail) in worn condition. If it's only somewhat worn, $35.
As of 04/2014 auction values are in the range of $30 to $200 for a circulated bill, and up to $3000 for an uncirculated one. The brown seal indicates it's a National Currency Note, an infrequently-issued form of paper currency discontinued after the 1929 printing. It was actually printed in Washington but distributed through the Chicago Federal Reserve Bank.
Assuming it has a brown seal and says National Currency, about $25-35 depending on condition.
Assuming it has a brown seal and is labelled "National Currency", your bill is worth $25 to $35 retail.
$130.-$175. depending on how worn it is.
There are many varieties of US $20 bills that have brown seals, but only two types were printed in the 20th century - the 1929 series of National Currency Notes and the 1934 series of wartime currency printed for use in Hawaii.Please see the questionsWhat is the value of a 1934 US 20 dollar bill with HAWAII on it?What is the value of a 1929 US 20 dollar bill?
Your bill should have a brown seal and say National Currency. If it does, it's worth $130 to $175 retail.
Assuming your bill has a brown seal and says "National Currency", it's worth $15 to $35 depending on how worn it is.
There are several varieties of US $50 bills that have brown seals, but only one type was printed in the 20th century - the 1929 series of National Currency Notes. Please see the Related Question for values.
A brown seal was used on an issue called National Currency. This type of note was not widely issued, but they remain common in collections. Your note might retail for $25 to $35 depending on its condition.
No US $20 bills were dated 1920. A brown seal most likely indicates you have a 1929 National Currency Note. If so, values depend on which bank distributed the bill. Please see the question "What is the value of a 1929 US 20 dollar bill?" for more information.
The Hawaiian brown seal $1.00 , $5.00 & $20.00 were issued in the Hawaiin Islands 1942-1944 and were the only currency used. The reason was to guard against invasion contamination of US currency.
If it has a brown seal and the wording "National Currency", it's worth $40 in average condition, up to $125 if only slight wear shows.
Would need to know date and condition to estimate value.