Scott 634A Earliest Known Use

Hi.. I bought this cover at a stamp fair recently. I am new to this so I dont want to Sound nieve but.... on the reverse side of the cover were These stamps.. I THINK they may be scott 634a but if they are then , as far as I know, it would be the earliest know use of These stamps. the cancelation is Nov 1928 and it was sent from a stamp dealer to Germany.. If they are and it is, then I am looking for some advice as to what I should do next.. thank you in advance for any info. you may be able to provide me with..

Perf 11 or 12?

11x10 1/2 . I know it seems unlikely but the cover is sent from 'City stamp Co., New York' and it is addressed to one J.Rosenberg, Berlin.. after a bit of Research on the web I believe this to be Jacob Rosenberg, who came from a well respected Family of art Dealers. He worked in the University of Munich and later became the curator of prints at Harvard University.. this is why I think it may be possible.. But of course I could be wrong about everything and just getting excited.

Such a luck if they are...

my guess: SC634 or 554, not 634A

hi.. this is it you see. I only started looking at stamps about a month ago and actually went to the stamp fair to get some other stamps looked at ( nothing worth mentioning).. and I only bought this cover because I liked the envelope..i didnt even notice the stamps that were stuck on the back of it (other stamps on the front)..but I am pretty positive it is a type2 and is definatly 11x 10 1/2.. either which way I am happy as it only cost me 8 euro..

stamp is #634...type I....
dont see the strenthening of the hair lines.
Can not be #554...that is perf 11, flat plate printing.

here is a Picture of the front and a closer(?) look at the stamp. sorry, I dont have a scanner and am not much of a photographer either, or Computers for that matter. :)

there is a terrible glare off his head in the Picture. dont see so much White at all in real life.

ok.just went out and got myself a good magnifying glass. sorry, I am now getting 11 1/2 x 10 1/2 with my perf. gauge... sorry about that..thanks anyway..but I have a few other ones and These stand out a mile for colour and print. back to the books

sorry, I ment 11 1/2 x 10 3/4.... but that cant be right either... I obviously havent quite got the hang of this yet. but those figures are Fitting like a glove under my clearvue gauge even though I know they cant be right.

Some magnifying glasses may distort what you're looking at, so be careful when using them with a perf gauge. You could try taking a picture of the stamp on the perf gauge then look at it more closely on the computer. I'd also take a bunch of pictures and hope one would give me a better look at whether it's a type I or II.

As others have said, it might very well be the 634 since that stamp was issued 2 years earlier.

stamp is #634.....guaranteed.

or am I making some sort of fundamental beginners mistake in reading this?

and I have just learnt how to take a proper Picture with this camera..

Not sure what perf gauge that is... how does it measure if you use the circle perf gauges that run sideways?

Based on your new scan I agree with Kevin its a type I.

http://www.1847usa.com/1922/634vs634A.htm