check the web sites gunsamerica, auctionarms, and gunbroker.
I don't recognize that as a serial number used since 1954. It's either not a FN Browning Hi Power or it's older then I know about.
1965
In the year 1898.
No.
Does this guns say "acier special" on the barrel? If so, it is not a Browning Arms Co gun, but a FN Auto5. Acier special means Special steel, and barrels marked this way are only on FN sales guns, not Browning. FN produced the guns for sale outside the US and were not imported to be sold by the Browning Co. By serial number 42xxx alone, this gun was made in or around 1913, but it would be an FN Auto-5, not a Browning Arms Company A5. The FN version is mechanically the same as the Browning version, but markings and finish may be different. In 1913 though, Browning Arms Co. did not yet exist; Not until 1923 when Browning began importing as BAC. Although the Blue Book of gun values doesn't differentiate these guns from the more desireable Brownings, prices are lower because of engraving, style and other differences. Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Auto 5's with recoil pads, poly-chokes, compensators, and refinished wood & blueing will reduce value. Recommend taking it to a gun shop for appraisal, but keep in mind that few appraisers know the information and history of the FN guns. Please leave a message on my board with any further questions.