Painted numbers on engine

[Mustlust]

Any ideas?
https://www.aulro.com/mobile-gallery/cdfd016a935093a2fdd9eef39bee496a.jpg
https://www.aulro.com/mobile-gallery/76012015e2f665c394679ee8972d1169.jpg

[cjc_td5]

I think the consensus is that the numbers are factory batch numbers of some sort and are not trackable.https://uploads.tapatalk-cdn.com/20190101/d4b04efb09ec93791f4490cacc66ebd1.jpg

[4bee]

If it is a military engine I have seen references to it identifying the Base Workshop that did a rebuild.

Other than that no idea.

Black Knight could verify if that is the case.