The early J-3's definitely have German parts in them. I'm not sure if they were spares, left-overs, or "seconds". My ZK Sonnar from 1949 has the same SN markings in the rear fixture. The early KMZ J-3's had uncoated rear triplets that are perfect fits in the pre-war lenses. The Wartime German lenses had coated rear triplets.
This would be a "272" block part.
My 1949 ZK 5cm f1.5 has a rear fixture from 1943 an earlier serial number that my SN285 block lens.
"189098", I would guess was left-over from the SN218 block of lenses, which is ~1937 or so. Left-Over or a Second? Hard to tell.