Vintage Corner: Remo's precursor to the tuneable pad (Part III, sort of)

Here's the followup to my previous posts about the Remo tuneable practice pad.

First, Remo has a really cool little timeline at their web site that allows you to see major developments from the company's beginnings up till around 2007 (the timeline could use an update). From there, I was able to learn a few things that helped me to place the Remo pads in my collection on the historic timelime.

My plastic pad dates from the 1970s.
My two metal-rimmed tuneable pads date from the early to mid 1960s -- basically, until Remo began making tuneable pads with hard plastic rims.
But I have two pads that pre-date these pads, and I always wondered exactly where they came from.

These pads are not tuneable. They are constructed entirely of wood and use very early versions of Remo's synthetic drumhead material, for which patent paperwork was first filed in 1957 (the patent was granted in 1962; prior to this, most drummers had to live with calfskin heads and the vagaries of temperature and humidity that affected them. The synthetic drum head was a revelation as well as a revolution).
Beneath the head there appears to be what's left of some kind of foam (padding? muffling?); it has disintegrated over the decades, leaving a pad with an unsatisfying, hard "thud" sound.

Construction: each pad is made of wood, a built-in tilt and a sound chamber made of a thin piece of wood that looks like it was heated and bent into a curve. The framework holding the head is mounted on top of the curve, making for a resonant pad.

One of the things that can stymie research is a lack of serial numbers or other markers. These can be found on drums, but generally never appear on practice pads.

However, Remo's timeline gives us some help in determining exactly how old these pads are.

Remo's timeline goes as far as charting the course of its "Crown" logo design over the years, which in this case helped me more closely date these pads, the first produced under the Remo brand.

The larger pad's logo is worn, but still visible enough to determine a manufacture date.

Based on Remo's timeline info, that would date this pad to right around 1958-60, making it the first generation of practice pad offered by Remo.
Below, the logo from the smaller pad.

This means that the smaller pad is almost surely from 1961, since the new plastic-rimmed pad was rolled out in early 1962.
Not all companies provide such useful historic information to collectors, but Remo's timeline is especially helpful here. If you look closely at some points along the timeline, you can even click on links to patent information.

Like I said, playing these pads is NOT an exciting experience. The feel and sound are klunky.
It would be great to find a pad in as-new condition, with the foam in original shape, so I could get a better sense of how it sounded in the late 50s.

I hope you've found this exploration as interesting as I have. Happy drumming!