Requesting help with Polerouter crown

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So I have the option to choose between two crowns for my Polerouter. The crown on the right is 3mm thick and the one on the left is 2.18mm thick. Both crowns are 5mm diameter. The currently installed generic crown is 4.84 mm in diameter and 2.35 mm thick. Which one is the more appropriate crown for my Cal 69 Polerouter?
 
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If you were thinking logo, the shield U (left.) Based on the lugs, I'm inclined to say the thicker one (rounded U) type.
 
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If you were thinking logo, the shield U (left.) Based on the lugs, I'm inclined to say the thicker one (rounded U) type.
What about the lugs inclines you to suggest the one on the right?
 
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What about the lugs inclines you to suggest the one on the right?

Lugs are the thicker, later Polerouter case type, so a thicker crown would probably better suit.
 
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What is the production date?.
 
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What is the production date?.
I’m unsure but I’m assuming 1967 based on the caseback engraving which appears to be from a third party. Serial number is 241XXXX