That is definitely custom and not factory. No factory 24" barrels, no CC receivers, no straight grips on Model 100. The only common Ithaca SKB sxs model with the silver nitride finish was the 200E (which was also available in an engraved, blued receiver version). I recently parted with a Model 100 that was coin finish and game scene, but it was made for the European market and was not an Ithaca import.