Early Spectroscope Apparatus Machine 90+ Y/O Ad Trade Card

Description

Early Spectroscope Apparatus Machine 90+ Y/O Ad Trade 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 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
ORIGINAL 90+  YEAR OLD TRADE  ADVERTISING CARD
A SPECTROSCOPE
Spectroscopes are often used in astronomy and some branches of chemistry. Early
spectroscopes were simply prisms with graduations marking wavelengths of light.
NOTE:
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE
THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
SEE SCALED IMAGE ABOVE.
THIS CARDS IS NOT A MODERN REPRODUCTION
THIS CARD IS 90+ YEARS OLD
IT IS NOT PERFECT AND THIS CARD MAY HAVE
SLIGHT PAPER LOSS
SMUDGING
ROUNDED CORNERS
SURFACE CREASE
SEE THE IMAGES ABOVE!
37
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!
1) D
O NOT PAY THE FIRST AUTOMATIC INVOICE
FROM EBAY!!!!! Shipping is very very wrong.
2) Please wait until you receive a revised invoice with the correct shipping and options before paying
3) READ 1 & 2 Above again before you bid. Thanks!!!!!!
No returns, sold as is. I do my best to let you know the condition of my items. No insurance unless requested. THANKS!
Portable Gaiffe mercury turbine interrupter for a small X ray coil. It is self contained by having the impulse motor windings on top of the unit to rotate the turbine. There is a separate sets of turbine contacts inside the pot to drive the windings.
One gas cock is broken at its stem  and both pieces are there and can be repaired by a good jeweler and re threaded.
Very rare item and complete!