Data cartridge HBI-55 Sony Hit Bit 4K Bytes

Image of Data cartridge HBI-55 Sony Hit Bit 4K Bytes
TitleData cartridge HBI-55 Sony Hit Bit 4K Bytes
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Sony Data Cartridge

I have come across one of these brand new and sealed.
Is it worth anything.

MSX Sony 4k cart

Hi!. I have a Sony 4k HBI-55 cartridge, but I do not have the user manual and I do not know the commands to use it, do you have the manual to send an electronc copy to me?
Thank you,
Claudio