I so appreciate it when people are sharp and have a good 👁!My apologies. I assumed the gun on the left was a silver streak.
By chance did you replace the barrel? I ask because the guns front sight appears to be a partridge (as apposed to the bs on the right which is a serrated ramp style. The partridge front sight ended early in '64.
It is the original barrel but in my younger years I ruined the original cutting it for a hood etc etc.
Here are the before pics.
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