Distillation Head - Silvered, Vacuum Jacketed, Magnetic Divider, Pyrex Lab Glass

Description

Silvered vacuum jacketed distillation head.
Main body is about 17.75" long and about 3.75" wide
Top joint labeled: 50/50 standard taper
Bottom joint is unlabeled, but measures about 50mm at it's widest and about 45mm at it's narrowest (which would make this a standard taper 50/50 joint as well)
One side joint is labeled 28/15 spherical joint
Labeled: "Cal-Glass, Mfg Costa Mesa" and "Lab Glass, Inc Vineland, NJ"
There is a moving glass mechanism inside that can be controlled with an external magnet to alter the flow of liquid between two outputs.  We tested the mechanism with a strong refrigerator magnet, and it worked just fine.
We are not including a magnet for it, but just about any small electromagnet would work to actuate it.
I wouldn't use a very powerful magnet for fear of damaging the glass.
This item is in beautiful condition.
There are no chips or cracks, and all parts are in fully working order.
It is difficult to take pictures of an item that is composed of parts that are either transparent or reflective, but we have tried our best.
If you need any more details, let us know.
This may actually be new old stock with almost imperceptible shelf wear.
But, because we don't know its full history we are listing it as used.
See pics.
Includes free shipping.
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We have recently acquired many pieces of laboratory glassware.
We will be listing several additional pieces every week during the coming months.
We are not experts in identifying or understanding the uses for all of these items.
We have done our best to identify each piece, take measurements, label joints, etc.
If we have left out an important piece of information, or if we have misidentified something, please let us know.