Brno ZG47 serial number

[badform]

Greetings, and a first post from a new(ish) forum member.

I recently acquired a Brno ZG47 in 7x64, dated 3/59, with a serial number in the 13xxx range. It has the plain stock and a 55cm barrel. I noticed today that the bolt handle is also stamped with a serial number... but it differs by 70 numbers from the serial on the barrel. I am wondering if the bolt should actually be numbered to the rifle, or not. Anybody have any ideas? Your feedback would be greatly appreciated!

[GG375]

Hello badform

Yes, I'm pretty sure the numbers should match. I don't own a ZG47 but I do have a couple of Model 21's and a couple of ZKK rifles and they all have matching numbers......since the ZG's were produced after the M21's and prior to the ZKK's I reckon they would have had the same numbering system.

Cheers mate.

GG

[badform]

Many thanks for your input! I had wondered whether I had asked a particularly stupid question...
But then I suppose that it was a bit stupid, standard practice being, as we all know, to number the bolt to the rifle. I was just curious in this case, given that there is discrepancy of only 70 numbers. A very well informed forum member kindly drew my attention to the fact that there could be any amount of reasons for this.  I guess we shall never know.
Cheers!