Last Sunday at the auction

I was high bidder for 6 straight razors.....have identified 5 of them, but this last one leaves me stuck.....on the blade is marked "WARRENTED BY BUOL BROS", on the tang is marked "CASE BROTHERS CUTLERY CO. NY. N" and on top is marked "TESTED X". Sorry about the scanned picture quality.....one scale is broken, but sure like the color of the scales....Thanks

A Case for sure. I've seen Case razors with the same blade profile.

Buol Brothers may have been a hardware store, a barber supply shop, or even a regional distributor.

Should be a fine shaver.