Not sure which rifle you are describing - I have a Savage Model 24 here - on the receiver, is stamped "Savage 24C - Series M" - is/was the "Camper's Special" - 22 long rifle on top and 2 3/4" chamber 20 gauge below. The barrels are circa 20" long. Front sight is NOT a bead - is actually part of a band that holds the upper and lower barrels together - the front sight has got a short ramp and the sight itself appears to be a round top post - it might have had an ivory or coloured "dot" on the top end of that post at one time - is mostly gone now.
My eyes won't handle barrel mounted rear sights very well any more - so I drilled and tapped and installed a Lyman 53D, which apparently is the rear aperture sight they made for that rifle - seems to work fine. The aperture is actually slightly behind the breech, but ahead of the hammer when the thing has been fired. This rifle is the type with the two barrels joined from breech until just forward of where rear barrel sight was - then they are free of each other until that clamp affair under the front sight. I understand that Savage did multiple variations about how or whether the barrels were joined together or not.
My problem 24 is also a 24C. The front sight is nort like yours. The sight is on a screwqed on ramp not part of a barrel band. The top of the blade is rounded like a bead, blued not brass or ivory though. I have another 2
Savage 24 (22/410) C serial number, box says "field grade" It has as front sight like you described.
24C
Field grade Savage 24: