Turn the laptop over. Remove the main battery and the small service cover. Look for a sticker near the RAM slots. Common motherboard codes for Compaq 610:
How to identify the correct BIOS image for a Compaq 610 compaq 610 bios bin file
If you need a (like F.06 or F.20) or if you are looking for a clean dump for a hardware programmer, please specify the motherboard part number. Turn the laptop over