If the writing on my Primo Amps Scratches off, are they fake??

I have 16 Schering Primo amps, clear amp, with green writing and a BLue dot. The Blue dot does not SCRATCH off, and i tired hard. But the green writing scratches off fairly easily. I think they are made in Germany, the oil inside seems to be thick. Are these fake or real?

Here are some pics: But You'll Have to CUT and PASTE the link addresses in order for them to work..

http://www.geocities.com/umvagia0/primo1.jpg
http://www.geocities.com/umvagia0/primo2.jpg

Any ideas or help would be very appreciated.

thanks

GM

if the writing scratches off they are fake.

real ones the writing is burnes into the glass!