Sri Lanka. Eleventh Note Series

The rupee (Sinhalese: රුපියල්, Tamil: ரூபாய்) (signs: රු, ரூ, Rs; code: LKR) is the currency of Sri Lanka, divided into 100 cents. It is issued by the Central Bank of Sri Lanka. The abbreviation is generally Rs., but SLRs. is occasionally used to distinguish it from other currencies also called rupee.
The theme of the eleventh series of notes issued in 2010 is “Development, Prosperity and Sri Lankan Dancers”. Source

20 Rupee Banknote

Front: At the center of the front of the note, is a drawing of the view of the Port of Colombo as seen now and in history. The bird that appears on the right is the Sri Lanka Serendib Scops Owl (Otus thilohoffmanni). The butterfly that appears on the lower left corner is the Baronet (Symphaedra nais). 

Back: When the back of the note is viewed vertically, at the center there is a traditional Ves Netuma Dancer dancing to the tune of the Geta Bera Drummer next to him. The Punkalasa, or the “pot of plenty”, which is a symbol of prosperity, is on the top right of the note. A Liya Vela, or “the stylized floral motif” appears on the right side of the note.

50 Rupee  Banknote

Front: The newly constructed bridge in Manampitiya appears on the center of the note. The formerly used bridge, over which both trains and other vehicles ran, appears to the left of the new bridge. Above both, is the faint visualization of a historical railway arch bridge. The bird on the right side of the note is the Sri Lankan Dull Blue Flycatcher (Eumyias sordida). The butterfly on the left is the Blue Oakleaf (Kallima philarchus).

Back: When the back of the note is viewed vertically, a Vadiga Patuna Dancer (who belongs to the low country dancing tradition) is dancing to the tune of the Yakbera drummer, playing his Yakbera drum to the left of the dancer. The guard-stone of the Punkalasa, or the “pot of plenty”, which is a symbol of prosperity, is on the top right of the note. A Liya Vela, or “the stylized floral motif” appears on the right side of the note.

 From Rita received on 8/6//2018. Thank you!