Old Indian coin [resuelto]

Hi
please help me id this one
4.3gr, 20-21mm, thanks

Chola empire

1 Massa - Sahassa Malla
https://en.numista.com/catalogue/pieces10554.html

Ceylon copper Massa Coin issued during the period of
King Sahasa Malla (1200-1202AD)
Younger brother of Nissanka Malla
House of Kalinga, restored (1200–1209AD)

Denomination : 1 Massa (Kahawanu)
Alloy : Copper
Diameter : about 20,0 mm
Weight : about 4,2 gram
Shape : round
Edge : plain
Year of issue : 1200-1202AD
Type : struck
Mitchiner #840-841

Obverse :
Traditional Massa design of seated king and devanagiri characters
Writing : Sri ma t-sa ha sa ma lla
Reverse :
Traditional Ceylon Massa design of standing king


here are some usefull links:
States:
https://en.wikipedia.org/wiki/Polonnaruwa_period
https://en.wikipedia.org/wiki/Kingdom_of_Dambadeniya
coins:
http://lakdiva.org/coins/medievallanka/polonnaruva.html
http://lakdiva.org/coins/medievallanka/dambadeniya.html

CitaQuote​

​Reference: MNI 840-841
Comments: Although the style of this coin reflects Chola origins, it belongs to the period after the Singhalese were able to wrest back control of Sri Lanka from the Cholas.

I had contact with praboth who lives there. I tried to buy some of these coins from him.
He helped me with the determination of my coins. He told me that (contemporary) replica's exist.
If you like the coin, that is not very important for me