Cal.19 vs Cal.19 LB Mainspring barrel/Mainspring

Hi,
Does anyone know if its okay to use a mainspring barrel and mainspring from a cal.19 LB in a cal.19 ?i used the arbor from the cal.19 inside the barrel of the cal.19 LB and how i understand the spring should be the same in both.The watch runs good but i thought i should ask if someone has some experience on the matter 😀
Regards.
Rune