I found on www.stampworld.com in the section "1947-1948 Previous issued stamps surcharged" perforations 12½. I have one with 14 perforations and I would like to know if it is to be considered rare.
Thanks for the clarification. So the value of €. 6,00 (about $. 7,00) as shown on the website of stampworld.com (attached image) is realistic although there are no estimates for stamps with 13 and 14 perforations. Can you confirm this?
Firstly; Stampworld catalog is not a complete thing. In the Scott cat. these stamps are 768-774 ,1947,perf 12 1/2,13,14. The 7 stamps with this surcharge came from previous printings. So the stamps have perfs in this order,12,14,14*,13,12,12,12 1/2. Your stamp* was a unissued stamp without the surcharge;with perf 14* https://www.spink.com/lot/CSS31002661
I wonder if there is a problem here with understanding how perforations (shortened to 'perfs') are measured. We don't count the actual number of perfs. We count how many perfs there are within 2cms, & for that we use a perf guage. I can't explain it any better than the info that Mystic stamps has posted here -
In Italian, the instrument for measuring the number of perforations is called the "odontometer". My odontometer was tested with some hundreds of Italian stamps and verified on the Italian Sassone catalog (in this regard, if someone needs to have news on Italian stamps ...). So I'm sure the stamp in question has 14 perforations. I do not have the Stanley Gibbons and Scott catalogs. Maybe I did not understand the last post but I still have the curiosity to know if a stamp with the same characteristics as mine (not issued, overprinted and with 14 perforations) is listed in one of these.
CBeef, the issue here is that you are not using catalogs and instead going off stamp world. It's probably not whether or not the stamp in question is Perf 14 but rather if stamp world lists all variations of stamps. You really need to reference a catalog for detailed information like this.
My very old (1981) Yvert et Tellier catalog, lists this stamp (#616). The value for the mint stamp is minimal (0.40FF). So, the stamp is real. Y&T is widely used in W. Europe. For Latin languages speakers, French Y&T is easier to understand than German Michel or English SG.
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Posted 05/22/2018 3:08 pm
I found on 
In Italian, the instrument for measuring the number of perforations is called the "odontometer". My odontometer was tested with some hundreds of Italian stamps and verified on the Italian Sassone catalog (in this regard, if someone needs to have news on Italian stamps ...). So I'm sure the stamp in question has 14 perforations. I do not have the Stanley Gibbons and Scott catalogs. Maybe I did not understand the last post but I still have the curiosity to know if a stamp with the same characteristics as mine (not issued, overprinted and with 14 perforations) is listed in one of these.
