Hi again. Blue Label serial number stickers are...blue. If the stamp looks like the object next to the words Prometheus Lights, at the top of each of his website pages, then it's a Ready Made.....but I thought Ready Mades only came with neutral MC-E emitters. It's possible that someone performed an emitter swap on it. You may need to ask Jason to be absolutely sure.
When I read the original post, I didn't notice the serial number. That's an early one.
As far as I know, components from the different product lines are all compatible with each other. To confirm, I just replaced the Ready Made with Icarus driver pass around light's body with my Shorty Blue Label tube. It looks and works great.