Nickel silver discoloration?

I've noticed that more of my German-made folders seem to have NS bolsters that 'yellow' more than the domestic (U.S.-made) ones do, just in exposure to the air (none are in leather slips). I assume they've utilized a different compositon for the alloy. I can think of at least a couple from Hen & Rooster, and some 'Buck Creek' folders made in Germany that yellowed noticeably. In particular, the Buck Creek knives' highly-polished bolsters have taken on a beautiful, almost gold-like tone; I've opted to let it be, instead of polishing it away.
I find this to be true also I have a Bulldog with ns bolsters and shield that tarnishes from air within weeks of being polished.
I'm a big fan of Rough Rider folders, but there's no question in my mind that RR bolsters discolor (in open air) MUCH faster than the bolsters on my Case knives. I think the Rough Rider bolsters are "yellower" than Case bolsters even right after polishing with something like a "sunshine cloth".

- GT
 
I wish my German Silver bolsters would yellow.
("German Silver" and "Nickel Silver" are the same alloy. "German Silver" just sounds ever so much more ... "classy" ... "dignified" ... :) )
 
I've noticed that more of my German-made folders seem to have NS bolsters that 'yellow' more than the domestic (U.S.-made) ones do, just in exposure to the air (none are in leather slips). I assume they've utilized a different compositon for the alloy. I can think of at least a couple from Hen & Rooster, and some 'Buck Creek' folders made in Germany that yellowed noticeably. In particular, the Buck Creek knives' highly-polished bolsters have taken on a beautiful, almost gold-like tone; I've opted to let it be, instead of polishing it away.

I’ve noticed the same on my Böker. My English made knives are carried the same way and don’t discolor. I’ve thought about polishing it but I have also come to like how it looks.
 
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