Countermark

https://rpc.ashmus.ox.ac.uk/countermark/677 
GIC 548
ΚΟΒ
rectangular 
9 x 4 mm 
2 quadrantes? As only current examples are 2x in Tiberian dupondii and 15 coins of Caesarea, likely applied atCaesarea 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4862 Show 4862 75 1
RPC I, 4862 Show 4862 77 1
RPC I, 4862 Show 4862 80 1
RPC I, 4862 Show 4862 82 1
RPC I, 4862 Show 4862 83 1
RPC I, 4862 Show 4862 78 1
RPC I, 4862 Show 4862 79 1
RPC I, 4862 Show 4862 81 1
RPC I, 4862 Show 4862 84 1
RPC I, 3869 Show 3869 12 1
RPC I, 4862 Show 4862 85 1
RPC I, 4862 Show 4862 86 1
RPC I, 4862 Show 4862 87 1
RPC I, 4862 Show 4862 92 1
RPC I, 4862 Show 4862 93 1
RPC I, 4862 Show 4862 95 1
RPC I, 3869 Show 3869 17 1