A Browning A-500g shotgun in excellent condition is worth about 900 dollars.
Sweet Sixteens, whether Belgian or Japanese, in original excellent condition, are bringing over $1000.
Check the auction sites.
That is 6.35mm (.25ACP). Baby Browning pistols are collectable if in original excellent condition. Standard blue guns bring up to $350-$400 with the original pouch.
if it is indeed in excellent condition the value would be between 550-650 dollars.
100-1000 USD or so depending on EXACTLY what you have and its condition.
$300-900 depending on condition, which grade, and which model Browning,
Fabrique Nationale d'Herstal