Comments: I won a 1939 Playball PSA 4 on eBay in November, 2002 and upgraded to a PSA 6 one month later with another eBay win. In October, 2003 I upgraded to a PSA 8 when I won an eBay auction from seller sparky62/Bill Kennedy. With Charles Klein holding down the 1939 Playball set, I opted to swap out the Hubbell for a 1941 Goudey PSA 4 with an eBay win in May, 2005. I had just discovered the 1941 Goudey set around that time and really liked the issue. A few months later, I upgraded to this gorgeous PSA 6 with a direct purchase from Mike Skerbe in December, 2005. I have not seen a nicer example (any color) since.

UPDATE: In the May 2020 Heritage Auctions offered up a couple of high-grade Hubbell color variations.  I wasn't actively looking to buy anything beyond the red 1941 Goudey I owned unless it was an example in higher grade to upgrade from the PSA 6.  Over the years I slowly realized owning just one of the four colors didn't make a whole lot of sense.  When this HA auction came up with two other PSA 6 examples (blue + yellow) I thought it was begging for my bids.  I won both cards leaving me with only missing the green example.  I look at this card as an early ancestor of today's parallels w/o the serial numbers of course.  I'm leaving the above placeholder in case a green version comes up one of these days.

UPDATE: I found a green example of this card, a PSA 5.5 on eBay, and made an offer in mid-2020. The seller countered with a price slightly below their BIN. We were far apart. Every month or so I'd throw out another offer. They wouldn't budge. It went back-n-forth several times. They sent me a best offer and I turned it down hoping I could wiggle it down a little more. That didn't work and I buckled after a few months. I sent them another offer matching their "best price" and we settled. I finally have the complete grouping of colors and couldn't be happier.