Well John it looks like in the side view from the top, stripped South American Mauser 98 bolt shroud, Enfield No4/No5 firing pin assembly, Enfield No3/P14-US Model 1917 cock on opening firing pin assemblies positions 2 and 3, unspecified Mauser 98 firing pin assembly.
I assume it's a South American bolt shroud because it's in the white. Markings will identify it further same with the bottom 98 firing pin.