These blue WWII OPA tokens are actually pretty common -- worth a few cents apiece.
$1 to $3 depending upon the condition of the token.
Found one on EBay for .99cents plus $2 Shipping.
Office Price Administration:HC 40cHT 40cMM $5.00MV $235.00TH 40cTY 40cUC 40cUH 40cUT 40cUV 40cUX 40cUY 40cVC 40cVH 40cVT 40cVU 40cVX 40cVY 40cXC $2.00XH 40cXT 40cXU 40cXV 40cXY 40cYC $2.00YH 40cYT 40cYU 40cYV 40cYX 40c
Red OPA Price List:HC 40cHT 40cMM $5.00MV $235.00(X-Unknown?)TH 40cTY 40cUC 40cUH 40cUT 40cUV 40cUX 40cUY 40cVC 40cVH 40cVT 40cVU 40cVX 40cVY 40cXC $2.00XH 40cXT 40cXU 40cXV 40cXY 40cYC $2.00YH 40cYT 40cYU 40cYV 40cYX 40c
2500
Opa Opa was created on 1999-07-05.
No, opa-opa is a self-aware spaceship with no gender.
There were used in the food rationing during World war 2.
You could say either 'grootvader' or 'opa', but 'opa' is far more common in the Netherlands.
Red Token And Value:HC 40cHT 40cMM $5.00MV $235.00TH 40cTY 40cUC 40cUH 40cUT 40cUV 40cUX 40cUY 40cVC 40cVH 40cVT 40cVU 40cVX 40cVY 40cXC $2.00XH 40cXT 40cXU 40cXV 40cXY 40cYC $2.00YH 40cYT 40cYU 40cYV 40cYX 40c
Toyota Opa was created in 2000.