Sicura movement question

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Does this Sicura central minute Chrono (early to mid 70s?) movement look correct - the plastic spacer looks out of place to me.

 
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Oooooo.... the lovely EB 8420-74 馃槈

I think it looks odd because there's no O-ring around the plastic movement holder.
 
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Yep, that's it! The once ubiqiquitous EB 8420-74 (maybe still are?).
I think it's a pretty nice looking dial and case is ok. Movement needs some work to keep it running 馃榿 I think parts for these movements are around or the movement replaceable; but not sure though.
 
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Yep, it is what it is and it's not trying to fool anyone. I like the case/dial and even have a grudging respect for the EB movement.
I think one should be in every chrono collection.