What are these later rear sight components please?

[tenOC]

Can anyone ID and give info on some of these parts?
I assume anything marked R is a Remington?
Most ramps are blue and very nice.
One base is low from front to back.
Note the top left ramp in pic 4 has a different script in the 0. It's from the sight in the first pic. Is there a way to ID that unmarked sight (pic 1) if it's not Remington? The ramp has no chamfering where the windage screw goes through it.
Anything of higher value here? I have a couple of unmarked bases not shown. One with no set screw provision.

Information

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[Chuckindenver]

03A3 rear sight parts.

[John Beard]

(1) You assume correctly. The rear sight parts marked "R" were made by Remington.

(2) The rear sight base with lowered ears was a victim of Bubba.

(3) The ramps (yokes) are from different periods of manufacture.

(4) Unmarked sight parts may be made by Smith-Corona or Hadley.

(5) I see nothing of higher value.

Hope this helps.

J.B.

[tenOC]

Thank you.