This is a long discontinued Honda HT3813 (water cooled tractor) radiator, part number  19010-750-801.

This is a used 40 year old radiator, there is no possible way I can offer any warranty on it. That said it's a high quality unit with brass tanks, it should be able to be reconditioned.

These all came from working units and didn't leak when used, but again, cannot make that guarantee due to age.

The radiator fins have some distortion but no obvious holes or damage, the radiator hose outlets are slightly distorted but hoses still seal fine.

It would be an excellent core to have rodded out, pressure checked, and made like new.

If you're not comfortable with that, you should fix your own radiator. If you've tried to fix your own radiator and they can't, this is a good alternative.

This is the only one available on ebay or elsewhere and the last list price was about $600 on one.

All units I have available are pictured. I will sell the best looking ones first and remove photos accordingly. One of them, which also did not leak, had a mount fall off. It could be jb welded or soldered back. That one also did not leak.