This page describes all the known US Kenner cardback/front combinations for the Jawa. I personally don't get too deep into weapon/figure variants, so I'm not trying to collect and document which figures showed up on which cards (other than the major variants like the VCJ).
The pictures on this page are from my personal collection. In some cases the piece is known to exist, I just don't currently own one for whatever reason so I don't have pictures yet. I'll try to discuss relative rarity in most cases, but don't necessarily read into the fact that I don't have one as meaning the item is rare. I'm not a Jawa focus collector, so missing a piece short term doesn't bother me. I look for the right pieces, at the right time and price. I pass on pieces all the time.
The vinyl cape Jawa (aka VCJ) was the first iteration of the Jawa action figure. With the exception of the Toltoys VCJ, he only appeared on Star Wars 12 backs. The bulk of the VCJ's appear on 12A cardbacks (maybe 90%), and a few are found on 12B. While VCJ's on 12C's were rumored to exist (including 2 with Harbert stickers applied), a true US Kenner 12C Jawa was never documented until recently (2018). As of 2022 I am aware of 3 that exist.
The vinyl cape Jawa was quickly replaced with a cloth cape Jawa, as the small size and cape was viewed as less of a value as compared to other figures in the line. Like the vinyl cape Jawa, the cloth cape came on 12A, 12B and 12C cardbacks. Since the transition happened on the 12A cardback, 12A cloth cape Jawas are extremely difficult to find (even moreso than the vinyl cape jawa)
The 12 Back cloth cape jawa came with 3 different bubble/tray combinations
Square (R2) Bubble / Yellow Cardboard Tray
Square (R2) Bubble / Plastic Tray
Angled Bubble
In addition, a 4th combination has been found on the 12A cloth cape Jawa which uses the square R2 bubble but uses an orange cardboard tray, which is folded like a "Z". This piece is most likely a transition and sample piece as I've only uncovered 2.
The 12B cloth cape Jawas are fairly common (as the transition to cloth caped had happened) and exist in all 3 bubble options, in roughly equal numbers.
Square (R2) Bubble / Yellow Cardboard Tray
Square (R2) Bubble / Plastic Tray
Angled Bubble
The 12C cloth cape Jawas are fairly common (as the transition to cloth caped had happened). For some reason only 2 variants have been uncovered on the 12C cardback, with the square bubble/plastic tray not having been documented on a 12C cardback yet.
Square (R2) Bubble / Yellow Cardboard Tray
Angled Bubble
For US Kenner cardbacks, the VCJ is only found on 12 backs. (It exists on an ESB 41 back for Toltoys). So for 20 backs and beyond, you will only see the cloth caped jawa. Also at this point they were using the angled bubbles, as the R2 bubbles were a transition piece from the switch from VCJs (which used a bubble unique to the VCJ)
The 20A offerless front Jawa is a fairly easy piece to come by.
Like most of the 20B's, the 20B Jawa is a hard piece to come by. Even for a 20B, I would consider it hard. People tend to focus on the second 8 (debut) on 20B's, but in my experience the Chewie and Jawa are the hardest pieces in the run to collect. I see a nice shape 20B Jawa show up maybe once every 2-3 years.
The 20C's (Fett offer with no sticker on the back over the Fett) are pretty high in demand, and hard to come by. The Jawa while hard to find, is one of the more common in the 20C run IMHO. Just make sure when buying one it has not been tampered with (people remove the yellow or black sticker covering the fett, and you can usually see some litho tears or discoloration if you look closely)
The 20D is the Fett offer front with the black sticker (round corner) over the fett. The Jawa is one of the harder in this run to find.
The 20F is a Fett offer front, with a black sticker over the Fett in back, and then a yellow sticker over the black sticker.
This is the common Fett offer cardback for the US... Fett offer front with a yellow sticker with round corners covering the back.
The cloth caped Jawa is not documented to exist on 21A back
The cloth cape jawa has not been documented on a 32 back
The cloth cape jawa has not been documented on a 48A back
The cloth cape jawa has not been documented on a 48B back
The cloth cape jawa has not been documented on a 65D back
The cloth cape jawa has not been documented on a 65E
The cloth cape jawa has not been documented on a 77B back
The cloth cape jawa has not been documented on a 79B back