1897 Braun Invents Cathode Ray Tube Oscilloscope Vintage Ad Card

Description

1897 Braun Invents Cathode Ray Tube Oscilloscope Vintage Ad Card
NOTE:
THESE ARE NOT POSTCARDS
THEY ARE TRADE/ADVERTISING CARDS.
THEY ARE MUCH SMALLER THAN A STANDARD POSTCARD
AND
THERE IS ADVERTISING TEXT ON THE BACK!
THE CARD DIMENSIONS ARE APPROXIMATELY
2 3/4 '' x  2 ''  or  7 cm. x  5 cm.
ORIGINAL VINTAGE ADVERTISING CARD
1897 BRAUN INVENTS CATHODE RAY TUBE OSCILLOSCOPE
Braun's discovery of crystalline materials that act as rectifiers, allowing current to flow in one
direction only, led to the development of crystal radio receivers. Braun is also known as the
developer of the cathode-ray oscilloscope. He demonstrated the first oscilloscope (Braun tube) in
1897, after work on high-frequency alternating currents.
THE REVERSE SIDE HAS FRENCH AND DUTCH TEXT
ABOUT THE IMAGE ON THE FRONT SIDE
THIS IS PRINTED ON 'NORMAL' WEIGHT/THICKNESS
PAPER AND NOT  PRINTED ON HEAVIER  CARD STOCK
SEE IMAGES ABOVE
THE CARD DIMENSIONS ARE APPROXIMATELY
2 3/4 '' x  2 ''  or  7 cm. x  5 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
THE CARD IS NOT A MODERN REPRODUCTION AND IT IS NOT PERFECT
THE BACK MAY HAVE MILD TO MODERATED INPERFECTIONS!
THERE MAY BE:
-SLIGHT PAPER LOSS
- SMUDGING
- ROUNDED CORNERS
- WEAK CORNERS
- SIGHT GLUE ADHESION ON BACK
SEE THE IMAGES ABOVE!
641
WE COMBINE SHIPPING
BUY 1 TO 4 TRADE ADVERTISING CARDS AND THE TOTAL TO SHIP IS
BUY 5 TRADE ADVERTISING CARDS AND SHIPPING IS FREE
NOTE:
ON LARGER INTERNATIONAL ORDERS WE MAY REQUIRE REGISTERD
MAIL AND WILL SPLIT THE COST WITH THE BUYER.
INQUIRE IF CONCERNED!