Finally had a chance to look through my notes. Thought I had more listed, but the three will help anyway...
132-43188
132-55677
132-55835
I would suggest though that a closer look be made at the serial number ranges were these are at. Of course between the high and low that is shown has a 16,748 range, but it looks like there are only about three blocks and it can probably be broken down even further than that...maybe two small batches in the 39xxx range (maybe), maybe two to three more in the 42xxx to 43xxx range (I'm talking small runs) and up to three small runs in the 55xxx range.
Then again, with as random as Ruger does things...there may have been as few as two batches.
Remember if the demand from distributors was not that great, Ruger would not have made huge batches of the .44 Mag. #3.
Here's the list below....notice that there are some patterns that are beginning to develop (coincidence??)
132-39138
132-39669
132-42133
132-43188
132-42205
132-42363
132-42366
132-42528
132-42558
132-42911
132-42967
132-42971
132-42984
132-43023
132-43187
132-55171
132-55373
132-55390
132-55677
132-55835
132-55886
If we can get another 2 or 3 dozen numbers here, we might be able to tell a little closer what happened.
There is still a potential of 200 guns here...but that would be on the low side I.M.O. Even the largest group above only spans 113 numbers, again with the possibility that other calibers are mixed in between.
What if most of the other numbers that are by themselves are random sn frames??
Chet15