Can't get turn signal bulbs in or out?

Just went thru this on my 65 valiant. In picture NAPA replacement setup is on left, original version on right. NAPA setup will work but bulb seemed loosy goosy so went with original set up with new spring and contacts. My spring on passenger side was completely disentegrated from corrosion and until I troubleshot prob. would not accept a new bulb at all frustrating me at first. Simple repair. Good to go now.

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