I may have a partial answer. The capital letter in a circle stamped on your gun sounds like a proof mark. To proof a gun, it was fired with ammunition loaded to several times the power of a normal load. This was done to ensure the safety of the shooter. If the gun survived the test successfully, a proof mark was stamped on it to show that it was a safe, tested gun. I don't know about the rest of your question, sorry.
The symbol capital R within a circle [®], or circled capital letter R, is the registered trademark symbol. This indicates that the product is registered with a national trademark office (ex: Registered, U.S. Patent and Trademark Office). If a trademark is not officially registered, then it will be marked with a superscript TM (in capitals).
An angle can be named with one capital letter.
Yes capital a is symetrical
A capital letter is defined by being printed in a larger size or different form than its corresponding lowercase letter. Pretty much any letter which is printed in a larger format can be capital letter.
O
Fabrique Nationale, or more commonly known as FN
The capital letter that stands for that type of trait. For example, brown eyes would be either BB or Bb ^ capital
An elemental symbol, or chemical symbol, represents an element and can be either a single capital letter or a combination of a capital and small letter. For example, the chemical symbol for carbon is "C" and for sodium is "Na".
The capital letter F is not symmetrical either vertically (B) or horizontally (T).
My sources tell me that production years are letter coded in the number letter combo stamped on the bottom of the reciever. Codes start with A = which equals 1949. I just picked one up stamped M and the listing said it was made in 1960. So I would guess that yours is circa 1959.
The capital letter of Australia is "C".
The Greek capital letter for Xi is Ξ.
The Greek capital letter for Lamda is Λ.
The Greek capital letter for Phi is Φ.
The symbol capital R within a circle [®], or circled capital letter R, is the registered trademark symbol. This indicates that the product is registered with a national trademark office (ex: Registered, U.S. Patent and Trademark Office). If a trademark is not officially registered, then it will be marked with a superscript TM (in capitals).
I would like to get my passport stamped, please. The little skunk stamped his feet, so I ran!
do you use a capital letter for the word knighted