Can Someone School Me On Split Seriffs

There's plenty of good resources available. I'll give you a couple. http://www.doubleddie.com http://www.varietyvista.com http://www.coppercoins.com http://www.error-ref.com/machine-doubling/ http://www.error-ref.com/part-ii-die-varieties/

Actually split serifs are noted on RPMs.

Note the lighter arrows.
On doubled dies, they are called notching from where the devices don't line up.
The wider the spread of the hubbing, larger the notches are:

Note on the two 5 spreads on this doubled die? That is probably the widest spread making a huge notch on those devices. On this one all the devices are show notches:

That is the extreme notch. But when the spread of the hubbing is a lot less, then were see what is often referred to as notching:

Note the 'E' on the next set of images:

Again note that the spread of the hubbing, creates these.

On Machine Doubling this is usually not seen:



Probably the only reason you might see this if the MD pushed the metal around a corner of a device.
(sorry no image that I have for this)
Does this help?