I am certain that whatever substance is in there is
not 94-year-old fruit preservative! I don't think anything was supposed to be in that pump.
You can try to untangle the puzzling sequence of events and corporate names and locations on your own, Cf mtn, but I'm positive that your pump is one half of a 1924 household appliance to perverse fruit that worked on the vacuum principle, no preservative (vegetable oil, jam, pickling, etc) or other process required. The other half of the appliance held a jar (ostensibly with special lids) in place. I think your pump was used to **** all the air out of the jar after the contents were enclosed in it.
As I alluded to upthread, A.C. Whitehead was incorporated in August 1923 in Windsor, CT (not "New Windsor" as I originally misread the notice), to make and sell a device to preserve fruit. It was called a "Hummel preserver" in the notice. (See thumbnail 1.)
As I also alluded to upthread, in May of 1924 A.C. Whitefield was advertising for salesmen for the device described as a "unique non-competitive household appliance." Note that it's not called a Hummel or a Preservall or any other brand name in the ads. (See thumbnail 2.)
In May of 1924, someone in Windsor, CT, seems to have taken them up on their business opportunity, advertising an in-home demonstration of the device, now referred to as a "Preservall." No reference to A.C. Whitehead by name. Note that Windsor is where A.C. Whitehead was incorporated. (See thumbnail 3.)
Here's where it gets tricky. Also and earlier in May 1924, comes an elaborate ad for the device (including an artist's rendering of it!), now being called the "Preservall", but citing the New England Preser-vall Corporation, in Hartford, CT, as the manufacturer. (See thumbnail 4.)
Finally, a 'salesmen wanted' ad, in January 1924, written with very similar language as the previous 'salesmen wanted' ads, for a "non-competitive household necessity," but from New England Preservall Corporation, Hartford, CT. (See thumbnail 5.)
My take?
A.C. Whitehead was incorporated mid 1923 to make and sell a vacuum device for preserving fruit. Your example, with no reference to a New England Preservall Corporation, proves that the device was called a Preservall by A.C. Whitehead. Shortly thereafter, and before January 1924, they apparently changed names to New England Preservall Corp, seemingly adopting the brand name, which is not unheard of (see Champion DeArment becoming Channellock!). They may have moved to a bigger location in Hartford or they may have used Windsor and its neighboring city of Hartford as their address interchangeably, also not unheard of.
Either way, I am positive that your pump is part of that device. Which is pretty darn cool.
Now you need to find the other half!