The total number shipped would be speculative, but in John Dougan's latest book it is said that Ruger took delivery of 1,046 salt cod boxes for single guns and another 202 salt cod boxes designed for a two-gun shipment. Although John says on page 67 that a total of 888 pistols were shipped in salt cod boxes "up to serial number 10,000", this statement is not entirely true as the records will state how the gun was shipped (if by Railway Express the records are noted as R.E.A.") but the records do not actually say these guns were shipped in a salt cod box, or outer box made of pine....there just simply was no room in the records for that kind of notation and they wouldn't have...REA was the important fact about how the guns were shipped.
At some point in history, it was no longer required to have items packaged in a wooden box to be shipped by Railway Express, and I'm not sure this didn't happen in 1950, as the highest known salt cod boxed gun known to date is 5009. It is doubtful I.M.O. if a large percentage of the 136 pistols listed in John's book higher than 5009 were also shipped in salt cod boxes. Ruger did have some type of distributor system by the time 5009 was shipped, so cardboard outer sleeves would have begun to be used by that time for at least distributor shipments.
Those shipped in a pine box most generally went as one-gun or in rare cases two-gun shipments to individuals who ordered by Ruger's mail reply. This occurred before Ruger's distributor system was completely set up.
According to JD's list, less than 50% of the guns sn'd from 0034 to 0660 were in a salt cod box. This dropped to less than 24% for guns #2000 to 3000, to 4-1/2% (3000 to 4000), went to about 11% (4000 to 5000) and guns s/n'd 5000 to 6000 shipped REA went back down to about 4-1/2% as REA shipped. Then REA shipments are really sparse after that, an average of about 1% for each 1,000-gun span after that up to #9899.
However....pistols sent in for repair, and there were a bunch of them that went back because of broken firing pins, could have been re-shipped in pine salt cod boxes because they went back to the individuals. Known s/n's of these include at least #6715 and possibly also #5604 (neither is listed in JD's book as being originally shipped in a salt cod box).
No two gun salt cod boxes are known today.
Chet15