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This file seems to be corrupted. Any chance of re-posting it?
My best guess 1968/1969Hello;
I have acquired a L61R Action only in the Blue three lug bolt
with a serial # 359xx and I am wondering the Production Date
Tom
My best guess 1968/1969
Now the No. 148990 is earlier with shroud, and the No. 1535o2 is later with
out shroud! How strange.
Regards Blackjack AKA Mike The Limey
Like nearly all Sako transitions, the shrouded bolt occurred over a period of time. I think it was 1978-79 when Stoeger announced the "new" A-series actions. This was little other than a marketing ploy (as American companies think they have to introduce "new and improved" products to keep them selling.) It appears that the switch to the A-series was much more Stoeger's idea than Sako's, but because of its volume the American Sako distributor has always been the tail that wags the dog. Sako continued to use the L-designations internally for many years after the presumed switch. For a long time even the box labels of A-series guns came labelled with L-designations.
It happened that Sako started converting to the (presumably safer) shrouded bolt about the same time that Stoeger was pressuring for a name change. Sako had lots of completed receivers already stamped with the L-designation when they began making shrouded bolts. As a result, nearly everything which came out of the factory up until around 1980 had the L-designation on the receiver, and some of those also had the shrouded bolts.
Eventually, Sako ran out of the L-stamped receivers and their production rifles all had receivers stamped with the A-designation (it appears that some L-designated receivers were shipped up until about 1980-81). It does appear that Sako used up all of the unshrouded bolts before it released any A-designated receivers, so you'll find L-rifles with shrouded bolts but no A-rifles with unshrouded bolts.
There have been a number of threads through the years on the differences between L's and A's. If you'll do a search I think you'll find that there was a lot of mixing and matching and that individual rifles in the two series vary in small features according to which parts were available when they were assembled.
Thanks so much for this. What a great forum this is--really knowledgeable Sako fans!SN 183127 would have been shortly after the conversion to CNC machining. 1986 is probably a good guess. I have an AI with a 183000ish SN & the hang tag is dated 1986.