Is that the original medallion, or did Ruger replace it when you sent it to Ruger?
I asked because the medallion in the OP’s photos doesn’t look like what it should look like. My medallion is missing and I’ve been looking for an original medallion unsuccessfully. My serial number is 42xx. My father bought it brand new in 1950 for $37.50.Good eye Gary.
After looking a bit closer at the OP's pics, I'd say his pistol is almost certainly a Type III Red Eagle. One of the more common varieties, but still collectable.
The serial number should be somewhere in the 3648-9101 range.