Browning will send you a manual for free if you contact them
Seek the services of a good gunsmith
Browning.com has sn data under customer service.
You will have to contact Browning for a correct answer.
Yes
100-1000 USD
Google.
The J Stevens model 107B break over 12 gauge single shot shotgun is valued at $125 in good condition.Ê In fair condition, it is valued at $50.Ê
It was made in 1946
They were made in .410 bore, 20, 16, 12 gauge, and may have had 32 and 28 gauge options, though they are rare if they exist. It should say on the barrel what gauge and choke it is.
What you describe does not exist.
The companion eagle arms 12 gauge single shot break down serial # 45382-54476? This gun is worth exactly $12.53. However, if you haggle, you could sell it for $13 with some skill.
100-1000 depending on specifics