I "found" this yesterday in Warburton, VIC. It was in an antique store and displays evidence of previous polishing. I recognised it as one of the earlier v 1. Sievert models. The box it came in: To be continued...
This morning I replaced the filler cap seal and SRV pip and fired it up: It works - well! I scanned the included instruction brochure to pdf, which included this (? dating info):
@snwcmpr, @Tony Press, @Camp numao, @Knee Thank you all! I hadn't explored this post: Earliest years of Sievert Svea 123? until after I'd fettled it.... It would appear to be a v. 1b I'm thinking...
I would say 1.b in the evolved/evolving typology. It’s early, but with the tank/shield fitting works. Tony