Are all 21J created equal.. ex. 2813?

[Synfreaker 0]

I've noticed some of our dealers have different pricing on advertised 21J, than on 2813 movements. Is there different 21 J's and is all of them basically 2813 or there are actually different 21's?

[dfq23 131]

Same thing just different way of naming em. DG2813 is a makers name for a type of 21j movement. Kinda like calling a vacuum cleaner a hoover or a pen a biro