In the .410 and 28 gauge, Field models were indeed LW models with mahogany stocks. The Skeet models were standard configuration with walnut stocks.

I remember the days when most competitors used 1100s in all gauges, and the smaller gauges weren’t the Lightweight models, nor were most of them Purbaugh’s modified 12 gauge guns. There were a few folks who shot those heavy small gauge guns, but most that I was around shot guns that were factory models.