THAILAND 1869 1/4 Baht (Salung) Y#29 COPPER pattern or off metal strike
Weight: 3.82 g
Diameter: measured 19.9mm
Struck in Copper
This design appears to be the Y#29 coin that is normally stuck in silver
I found pattern #s PN6,PN8 and PN23 that were the only ones that referred to a 1/4 Baht (Salung) , which were struck in copper 
