As much as reviewing the tables below is a long slog, there is much more to it than this (compared to examples I've reviewed, this is but the tip of the ice berg). The line items below may shed some light on the production sequence. This is a compliment to Trevor's post that inspired this collation of more detail. and more to come. So far, the content of the tables only cover 2 of the Svea 123 boxes: Green and RW (Red&White). Which btw transcends the Optimus buy out of Sievert / Svea and Optimus beginning it's own production of Svea liquid fuel pressure stoves, ie Optimus Svea 123. Note tables below identify Sievert and Optimus, furthermore there are TWO distinct parallel sequences: Green and RW. (Combining these 2 sequences into one list while retaining the accuracy of the sequence may be a possibility for future posts (a steeper challenge I'm not volunteering for)). Keeping the approach below I do intend to add the Svea lemon box (just the pre-123R) which will further add to the complexity as it is. LINKS: 00. https://classiccampstoves.com/threads/svea-123-new-old-stock.15932/ 01. https://classiccampstoves.com/threads/svea-123-52092-v-52.35754/#post-368205 02 https://classiccampstoves.com/threads/the-dating-of-svea-documents.35787/#post-368373 03 https://classiccampstoves.com/threads/early-sievert-123-stove-52092-v-52-maybe.35779/ 04 https://classiccampstoves.com/threads/svea-123-research-project-prelim.11516/page-2#post-111235 05 to image 20 https://classiccampstoves.com/threa...eet-ver-2-box-labels-instr.35854/#post-368917 06 https://classiccampstoves.com/threads/my-christmas-present-for-myself-as-easy-as-123.34371/ 07 https://classiccampstoves.com/threads/svea-no-123.892/ 08 to image 21 https://classiccampstoves.com/threa...eet-ver-2-box-labels-instr.35854/#post-368918 09 https://classiccampstoves.com/threads/sievert-svea-123.32838/ 0A https://classiccampstoves.com/threads/966-sievert-svea-date-and-address.32808/ 0B https://classiccampstoves.com/threads/svea-123-research-project-prelim.11516/#post-110783 0C to image 22 https://classiccampstoves.com/threa...eet-ver-2-box-labels-instr.35854/#post-368919 0D to image 23, 24 https://classiccampstoves.com/threa...eet-ver-2-box-labels-instr.35854/#post-368920 0E https://classiccampstoves.com/threads/why-i-buy-old-stoves.34819/ 0F i wasn't able to link to it (#30), use link 4, scroll up to #30 to see RW Svea 123 1-25-71 Notes: 1. re the A1 example: it precedes the A2 (1954) example (see both in link 04), but more A1 detail is needed to place it in-sequence above. FWIW for those doubting possibility of pre-1954 Svea 123, note A1 and 3 more examples above (more to come) do seem to precede "A2 (1954)" 2. the point in-sequence that use of plain cardboard box first began, the contents 100% Sievert, an Optimus date stamp on top 3. re A4 another example like A4 or more A4 detail is wanted, to then, better place A4 in sequence. BTW A4 box top has a typical 5 digit stamp, on that one it is 62_70. 4... long note 4: NEW OPTIMUS PARTS (at this time in sequence, Optimus developed new parts, same exact parts now used on 3 Optimus made models Opti Svea 123, Opti 80 and Opti Primus 71 (ie PTC): 2044 (penta-flat) filler cap: first used in late 1970 is what I gather. It is often referred to as type 4 on CCS. Worth a mention re c1970/71... filler caps, reviewing many examples, to-date i find: Opti's new 2044 (penta-flat) filler cap was first used with Opti Svea 123 RW box (Red & White box) stamped Stamford, CT (USA). Meanwhile the older 298D filler caps were also still in-use ie on Opti Svea 123s Grn box and Opti 80 and Opti P71. 5. It's not shown if 1-25-71 example has newer groovy riser of not. I'm leaning to: the use of groovy riser began late 70 early 71... which leads me to 2 clarifications > it does not mean use of older riser stopped (on 3 models) at same time, I note the continued use of older 298D filler cap and similarly > as to when the use of older riser did end? (to-date i'm not sure). Vapourizer (/riser) the riser gets groovy... in the late 60s the Sievert 123 & Opti 80/P71 risers were already compatible and very similar. *No.196 Vapourizer (/riser) per 72 Opti catalog: now w/ the"2 grooves" first used in mid/late 1971 (so NIB '1971s may have old riser or the newer groovy version). *my impression is groovy riser part no. 196 was short-lived, as soon after Optimus used 4 digit part nos. Burner head and burner plate used beginning c71 were also the same on the on all 3 models imo. Instructions "92131 black top". The preceding "92131" is titled "original Svea 123". Optimus blacked-out the top and in early 70s began using that same instruction for all 3 models. ...it's a start, thx omc
