Edwin, 'used' this stamp, and you make it worthless. Collectors will only pay the big money if the stamp was genuinely
used in the period in which it was on issue
I've no idea what the story is with this Swiss stamp, but it does
happen that particular stamps see very little postal use, and can be much harder to find used than mint. This (sheet of the) 1933 ¼ Anna stamp of Barwani
is catalogued at £320 used, and £24 mint. The sheet was favour cancelled - an obliging Post Office clerk cancelled the stamps for someone. The date is rather long after the stamps appeared, but ...
This is the only way I've ever seen this stamp actually used in 40 years of collecting Barwani. There was no postal need for it at all. You would have needed two of them to mail a postcard, and I've never seen that done.
So, if I wanted a 'used' specimen for my collection, and I did, I had to accept this second best. But a Swiss stamp cancelled, I don't know, a century? after it was issued ... You're not going to get $160 for it