One more

[5MadFarmers]

Makes two bonus posts.

Ebay thing

That sight was rebuilt. Before it was chromed. What makes me claim that?

Bonus points:

Udderly different eBat thing

Both are claimed to be "1st type," whatever that's supposed to mean, but one is earlier than the udder. Which? Why?

[5MadFarmers]

No bites?

Chromed is earlier.

Non-bevel spring.

"But a sample size of one!!!" True. Odds are against it. Not impossible but not particularly probable.