Yes, that would be the Model 51 made in 380 and 32 auto.
Remington's website has what you are looking for.
Condition?
Manufactured 1919
Click on the link below for photo Model 51
50-300 or so
Depends on condition, condition, and condition. From $100 to $1,200 LNIB.
Greatly dependent on condition. from $200 to $1,200 for new in the box.
$150 or less, depending on condition.
The value will be determined by the condition of the pistol. Anywhere from $0 to $500. In Mint condition especially in the box they can be worth double that.
You can only use .380 ACP ammo in a .380 pistol. Period.
The Remington Model 51 pistol was not made by Walther. Has nothing to do with Walther. See the link at the right for a reproduction manual. sales@countrygunsmith.net
Depends on original condition from a $100 parts gun to as much as a $1,200 new in the box.