Need Help With Positive ID Of This Swiss Standing 3f Perf 11.5 12

Thanks

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It looks like the cancellation is for 18 October 1900, although I am not fully ruling out 1909, or even 1908.
Before 18 October 1900, there appear to have been two issues
1891 perf. 11 3/4, and
1898 perf 11 3/4 x 111/4.
Your measurement suggests it is the first, original issue, as do the 14 perforation teeth on the sides.

You might want to show an image of the control mark on the back with measurements, or the watermark.

I count 14 teeth, perf is 11 1/2 and 12. So it is a 1907, but could be sc111a or sc125a. I don't know how to tell the difference. Are the teeth counts different between the two issues?

i do think that cancellation is for 18.X.00. That would exclude a 1907 stamp.
If it is the 1907 stamp, from what I can find, it has the Swiss Cross watermark. If that cancellation, indeed, is for 1900 and not 1908, it would not have that watermark. That would be the first step to identify the stamp correctly.
The two stamps you quote have different perforation gauges.

And Scott is really no good for perforations on these. They don't fit into half perf increments. Counting the perfs on the sides doesn't help much, unless the side is exactly 2cm. I'd guess it's a Scott 88a, but you need to look at the watermark and gauge the perfs correctly to be sure.

Billsey is correct. The 'Standing Helvetia's' are more or less the Swiss version of the Washington-Franklins. Better left alone unless you have a Zumstein


Peter

It is wm 183. It fits. So guess I don't get where this is going? Perf matches, wm matches, color/denomination matches. I'll have it authenticated.

Thanks folks.

Ok, my bad. Double checked WM and I see an oval now but can't make out what a cross. The 183 cross was missing, eye issue or head is what the question is. Sorry for wasting your time. I did learn a bit about dates.

This is most probably Scott 88 or 88b. As these stamps are sheet perforated the number of vertical perfs can be used to determin the perforation. As this one has 14 perfs it is perf 11½ or 12 vertically. Of some reason catalogs list 1901 as the issuing year för 88b but it should be known already 23 July 1900 according to my old Müller-catalog

Given perf 11 1/2 by 12 I catalogued as 88b.