Kevin,
Below is how the “Quadruple” was listed in the 1916 JVH catalog. Thanks to the generosity of many reel collectors these catalogs are free to download for ORCA members from our on-line library.
I really like the fancy knurled end cap and the rosettes under the screw heads to spread out tension from over-tightening which might crack the rubber end plate and to act as lock washers. I think a reel that size would be a “black bass” reel, with a trout reel maybe a smaller size 4 or 5 (New York reel sizes run in reverse vis-a-vis Kentucky reels, the latter —see a Meek catalog— which list a No. 1 as the smallest [trout] and a No. 5 as for the largest of the fresh water species such a carp, and even Tarpon.)
The word “quadruple” is seen on reels from various makers and would typically denote that the return gear ratio was 4:1, that is, one rotation of the crank would result in 4 turns of the line spool and a quicker return of the line, than say a “single action” trout reel with a 1:1 ratio.
Can you post a photo of the bottom of your reel’s foot and the “3-1/2” size marking you noted and I will check some other retailer catalogs, such as Abercrombie & Fitch that also sold JVH reels?
Here is a “4” stamp on the foot of a similar JVH:
