No.1 Mk3 bolt with many numbers.

[SpikeDD]

The first pic is a "batch number", exclusive to Australian production. You would find its matching number atop the right rear of the bolt channel directly underneath where the bottom of the bolt handle rests. The second number could possibly be a New Zealand added if the rifle had been in NZ service...may never know about that one. The last pic is the rifles actual serial number that this bolt was originally fitted to....that's a low number!!