Have Columbus 0 and 18 size good quality blued steel watch cases. Uncommon, only briefly
fashionable. Only good quality source seems to be Illinois Watch Case Co. Had 0s Columbus for a long time. Just paid a little extra for an 18s Columbus. Seller photo here. The gold on these 2 of 1895+ is solid alloy except bows. Very well made. 1900 ads are fun. Notice oxidized Nubian and Tasty for case descriptions. The 18s is marked Gunmetal Nubian. Except for Ingersolls, not many made, but refreshing visually compared to the usual gold and silver. Would appreciate comments concerning this case style.