77r in .358

[plumbcrazyjr]

i just bought a 77r in 358 and had a ? When was the 358 first introduced in the m77. Mine has a 71-37xx serial number
Thanks
Eric Rogers

 

[chet15]

i just bought a 77r in 358 and had a ? When was the 358 first introduced in the m77. Mine has a 71-37xx serial number
Thanks
Eric Rogers

1975 I believe. From your sn, you've probably got one of the first of those produced.
Chet15

 

[plumbcrazyjr]

thanks