Hi Jim,
it could well be a +3 sword. I was working from memory as I'm posting from a friends PC. The sword in question was one that you can buy from Ribald late in the game, I feel fairly sure it was a +4 2H sword but the name escapes me. Maybe the Harbringer +3 comes from Drow City and I've transposed the two, not sure. Thanks for pointing that out, sorry for any confusion.
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It's bleedin dark down here, slippery too.

Man, that's a pisser.