Re: 03A3 but the bolt body is marked: 88
03A3 bolts were made by several manufacturers.
All bolts need to be headspace checked to any rifle that they are going to be used in.
Also, I once bought a new bolt at a gunshow that I suspect of being rejected scrap. Be careful.
If you are fitting a bolt to a rifle, you should have a journeyman gunsmith level of experience; and be familiar with these now old rifles.