M1 Winchester question

[Drill Sergeant]

I posted this on another forum, however I have been disappointed with the lack of information pertaining to Winchester M1's there. Hoping to get some help here.

I need to understand the difference between the first & second bolts used in the Winchester M1. There is a 'step' referred to in the later bolt vs 'no-step' in the earlier. How will I be able to tell the difference.

Thank you!

[rkohut]

The no-step bolts were used for most of Winchester production. The stepped bolts came very late in production.

I don't think anyone knows the exact time they switched but the general consensus is very late 1944, around 2,500,000, and including all WIN-13s, until the end of production,

They were also used as replacement bolts.

[2111]

Look at the right lug that engages the operating rod. the first picture is early no step. Second late with step.
3171231713

[nf1e]

I just picked up a 1.32 mil WRA SG at CMP North Store and it has a bolt D 28287 1-WRA with the step. Bolt looks more blued than parked.

[musketjon]

I just picked up a 1.32 mil WRA SG at CMP North Store and it has a bolt D 28287 1-WRA with the step. Bolt looks more blued than parked.

Could be that it still has its original dulite finish on it.
Jon