The front sight on the 450 that I had was rectangular shape that appeared very similar to the rear base. It had a melted to the barrel appearance. I will look to see if I took any photos of it. I have about every thing else on the rifle photographed. The bead or actual sight that was on the front base consisted of a bead that sat right down on the base. It looked to have had a round insert at some time but that was gone just leaving a round hole which I filled with an ivory bead about 1/16 inch in dia. With a bead this low on the base, it was just a little difficult to pick up when in a hurry. I have no reason to believe this sight was not original to the gun.