52 zwitter air filter

[esde]

Reading through the progressive refinements and searching through some old posts, I've come close to figuring out what I need but still have questions..
My car is October of 52. According to progressive refinements the "Tee" style filter was replaced by an oil bath filter in August of 52. Then in September 52, assuming to coincide with the beginning of Zwitter production, it is an oil bath with 2 annular grooves on the bottom. Then January 53 is the start of the top strap oil bath filter. Can anyone provide a pic of the early, pre single strap air filter? I found mention that it might have a single wing nut on top, and that it might be labeled "Mann' but nothing definitive.
Happy thanksgiving, SD
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modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that.

[finster]

if you look in the technical section at the owner's manuals for 1952 - https://www.thesamba.com/vw/archives/manuals/type1.php - if you look at the french one, october, it has a photo of the strapless oil bath filter (page 18?) with wing nut. interestingly the december ones show a strap filter...
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"we're here on Earth to fart around" kurt vonnegut

nothing lasts, nothing is finished, and nothing is perfect...

[Jimone]

a lot of the US import zwitters were equiped with the cyclone air filter. my understanding is that it was a common "upgrade" for hoffman imports. could be worth getting a birth cert if you havent done so yet. they look cool too.
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november 1952 ragtop
november 1954 single cab

[Zwitterkafer]

The wingnut oil bath air filter was improved by having two raised rings pressed into the floor of the oil reservoir, to stiffen it. The floor of the reservoir appears to be double-walled, so the pressed rings are not visible from the outside. The same rings remain on the early strap-top oil bath air cleaner. I'm pretty sure I also saw pics of all this somewhere on this site, years ago.

I observe this stamped into the air cleaner tops:

Early wingnut, flat floor oil reservoir: "VW" "Knecht" "LB 602"
Early strap-top, ring stampings: "VW" "Knecht" "LB 602/1"

I cannot confirm how the "Late wingnut, with ring stampings" air cleaner would be stamped.
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- Zeuxius, 400 BC

[EverettB]

From the air cleaner thread:

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[Isbrand52]

I own a Oct 22, 1952 Zwitter My air filter is a wing nut style The floor is double walled with no (flat bottom) pressed rings The top has VW LB 602 Knecht stamped in it Bought car from original/first owner in 1970 so assume filter is original to car Date is from BC

[esde]