what gearbox do I have?

Hi. I currently have a 1975 1.5 LS 4 speed manual and was wondering if anybody knows what the gearbox code will be? 

Thanks 

The gearbox code is visible on the underside of the bellhousing.

I may be wrong!! But 1500 to 1800s used 020 type ones! Have you looked for the code that's stamped on it? I found my code on my box it was underneath car near to the sump! The will be a small machined face on the gearbox with letters and numbers stamped on it.

Sorry Paul didn't see your reply!