Stag is a LE from that time period, I am pretty sure I have one (without looking). A few times you can find a 300 issued with a earlier blade on a later date. There making use of extra parts. Or selling end runs, or proto runs, etc. I think this one was made in good numbers.
The pearls are sort of a odd ball. You can find them in white pearl with a couple of date stamps. Especially the anvil stamp. I have never talked to Joe at the blade show about them. I was told they made a run of some black pearls and some with two different colors on each side as salesman samples/protos. Have not seen many of the blacks so they must not have gotten the thumbs up for other than a test run. I like to call darker pearls grey versions, but likely they are just variations in the white materials used. A good person on the assembly line would try to match colors but I bet were not required to. So if you twist my arm behind my back I would have to say the grey and white are the same version. But, lets keep saying they are different for the heck of it. Remember you said 'speculation". 300