Sun burst convex button, yale lock 1940s/50s, reins guide or pipe fitting?

[RatherBeDigging]

Got a few hours between the rainy days to go hit 50 quarters. Ended up at 53. But the surprise was the sunburst button. No shank but a visible shank mark on the back. Same area as the Stockton and Burtis philada flat button. Any tips on cleaning the sun burst one? I've been slowly flecking off dirt with a toothpick and a very fine little paint brush. A damp qtip. Any idea on age?
Open to suggestions on that big green thing with threaded base. The one that looks like two halfs of draw pull. Was found near glass door knob.

 

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[ticndig]

equipment grease cup

door knob mounting plate

 

[RatherBeDigging]

@ticndig for the threaded green thing or the 2 halves thing? The green thing has a wide whole though it. Figured 21-1876 was a model number and nothing to do with a date.

 

[ticndig]

look at the pics , this is my idea of what you've found . I could be wrong . I'm sorry I don't understand your question.

 

[ticndig]

2-1-1876 could be a patent date

 

[Fat]

Hello, I think it’s an oil or fluid plug from an Oliver 80?series tractor. its made to loosen and tighten with a monkey wrench/pipe style wrench while holding a missing bolt with box end wrench.

 

[RatherBeDigging]

I'll get better pictures up when I get home tonight. Tractor part makes sense as area was farmed up to the 1950s. Photo update on 21-1876 item

 

[Digger RJ]

Nice!!! Congrats!!!

 

[RatherBeDigging]

Update. Looking like 2 half object might actually be two draw pulls after all. Got button cleaned up and it's actually a flower design.

 

[ticndig]

I'll get better pictures up when I get home tonight. Tractor part makes sense as area was farmed up to the 1950s. Photo update on 21-1876 item
View attachment 1891211

ok I'll change my guess with the better pics . I think it's a tie rod end from a tractor

 

[RatherBeDigging]

Any date ranges on this button style? I definitely don't know buttons. Only two old ones I've found were in this field. No clue on shank style as it's shank is missing.