"albino" Industar 50 collapsible lens

I got very early Zorki 5 camera (s/n 5800186 ) with "albino" Industar 50 collapsible lens. All other I-50 collapsible in my collection have black rings what hold front element. This one has white. why?

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/1022014_DSCF0203.JPG

http://www.ussrphoto.com/UserContent/1022014_DSCF0203.JPG

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/1022014_DSCF0204.JPG

http://www.ussrphoto.com/UserContent/1022014_DSCF0204.JPG

Hi!
Since the lens is OK! So it should be. I have several of these lenses, there all the same.
But I do not understand the button. At such an early issue I think should stand another type button.

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/1122014__MG_0336.JPG

http://www.ussrphoto.com/UserContent/1122014__MG_0336.JPG

http://www.fotoua.com/1cameratip.php?seek2=13&seek1=&usl=4&usl1=zork&seek3=1&rd=4&st=7
Early version of button

I'm not sure why button on the camera has new style. Possibly button was replaced at some point. Serial number on the camera the lowest what I can find for Zorki 5. Please check s/n on your camera, if you have earlier camera, or Zorki5 prototype.
The lens is more intriguing for me. I wonder if it original to the camera? Did all early Zorki 5 had "albino" lenses, or this lens some kind of exception?

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/1322014_DSCF0200.JPG

http://www.ussrphoto.com/UserContent/1322014_DSCF0200.JPG

<blockquote id="quote"><font size="1" face="MS Trebuchet, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by okynek</i>
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The lens is more intriguing for me. I wonder if it original to the camera? Did all early Zorki 5 had "albino" lenses, or this lens some kind of exception?
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Hi Okynek,
I think these albinos are seldom, but Alexej must know better if he has several of them.
How do you think about this I-22, it looks so much better than the usual ones.

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/2342015_Zorki-C I22N6216876.JPG

http://www.ussrphoto.com/UserContent/2342015_Zorki-C I22N6216876.JPG

I remember reading here, someone mentioned a Jupiter-8. The black paint was almost gone because it was shown behind a shop-window for a long time and heavy sunlight made the black paint disappear.
Could it be that it's only poor paint?