If you see a rack of 700's the engraving can vary quite a bit in quality. Always the same basic style but dependent on when it was done and by whom. 20 bore versions command a fairly good premium over their 12 bore counterparts here in the U.K. Rare to see 3" chambers so maybe a special order export model. I for one wouldn't like to fire heavy 3" cartridges through it as the recoil would be quite fierce I should think. Lagopus......