Jason, the numerals - 750- is a gold standard mark which is used throughout the world. This number means the metal is 750% of gold or 18 carat gold = high quality.
Questions for Jason
1. what makes you think the piece is mid 20th century? 2. is there any other symbols, or a depression mark or a decimal point between the letters?
3. what color is the gold, white or yellow? 4. is it set with gems? 5. can you describe the design, or the shape of broach? Don't worry, it's not an exam- but these details will really help.
