When JD's list was published in his latest book, it was surmised that the serial numbers listed there were all high polish since they were shipped late. This is not the case!
The guns were shipped late simply because they were held. Maybe it was because of the purple colored frames, maybe it was for some other reason, but not all the guns listed on that list are high polish. And not all the high polish guns that were made are listed.
The list only shows .357's that were shipped late.
Take it one step further and think about how those guns would be listed in the records. Ruger did not mark these "HIGH POLISH" in the records. The only thing of relevence that went in the records is the model number, serial number, the inspect (testfire) date (also called date of manufacture by collectors), the ship date and who the gun was shipped to. There was no reason to put finish changes or parts changes in those records as how a gun got to its final state of manufacture. You are only interested in the final product.
The logistics of doing their records any other way would be nighmarish! With all the employees that touched that #16 for example, would the employee in the shipping department care what parts or finish were put on it?? It would be different if it had a plated finish.
Maybe we collectors get caught up in the type of records that Winchester kept, with all the special order features that were available on their lever rifles. But with all regular production being STANDARD, you're going to see the STANDARD entry in Ruger's records.
Chet15