I think this was Westercon 1973 although it's possible it might have been 1972. The picture (see photos link) is from a skit done for the costume ball. It was called "The Hero's Reward" and I believe won the event.
In the skit, Jim and I actually fought with live broadswords. We rehearsed this pretty completely beforehand, and it was intersting that the SCA folks in the audience, who understood a lot better than anybody else what was going on, were really drawn into it. Note that we were both wearing steel armor and using shields. We were actually striking blows with broadswords, and the only coreographed blow in the fight sequence was the one where I "killed" Jim with a blow to his midriff under his shield (telegraphed during the previous sequence).
See photos of this event
Description of this event, Disclaimer: This history may have errors in it, as much of the detail is “remembered” history, or as one of the cover pages of the original type-written manuscript states “The material within is derived from the information printed in The Crown Prints and in The Page, and from the memories of the participants.” The original document was typed on onion-skin paper, with hand-written notes (often in the margins). All attempts have been made to reconcile the notes with the original document.
The West Kingdom History Website was created by and is maintained by Hirsch von Henford (mka Ken Mayer).