Pusher question for a 105.012-66

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Was there a transition point--either in time or by reference--for the change between screw-in and push-in? Or were both used during a period of time?
My guess is that the screw in pushers began to be used near the very end of 105.012-66 production. The following reference, 145.012, used exclusively screw in pushers.
 
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Hi OF, thanks to a very nice member, I've been able to get an original pusher... And I finally got my beast...
More pics in "recently" thread...
Thanks again for your advices.
I love this 105.012 CB...
The sides have suffered... Tough life I guess... But more than 50y later, still running, logo still shining, making me dream of moon more than ever...
 
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Oooohhh what a nice CB from a nice member !...🙄