i found only World Combat (AAD:B) but World Combat is an Asian version not EU.
The first letter of the three letter code usually describes the region or country.
A for Asia -- World Combat (ver
AAD:B) [wcombat.zip]
or World Combat (ver
AAD:B, alt) [wcombatb.zip]
J for Japan -- World Combat (ver
JAA) [wcombatj.zip]
K for Korea -- World Combat (ver
KBC:B) [wcombatk.zip]
U for U.S. -- World Combat / Warzaid (ver
UCD:B) [wcombatu.zip]
Those are the only five versions mentioned in the current MAME "Viper" driver source code. (lines 3099 - 3103)
https://github.com/mamedev/mame/blob/e13d0d433e70b6f7797f35ba770c4e8e83edf07c/src/mame/drivers/viper.cppDoesn't look like there are any European (E for Europe) or Australian (O for
Oceania) dumps.
If the correct file isn't in wcombatu.zip, wcombat.zip, or wcombatb.zip, you might need to track down and dump the RTC from a boardset that matches yours.
Scott