Hi Sayloc,
I have been considering posting a possible chronilogical order of the forms creation date, but mostly it is just educated guessing.
As far as 7* I think the 2 oldest forms might be beng bu and lanjie.
As far as PM is concerned it is along the following lines.
Connected Fist. Which is a form of the 18 families. If you have seen the 18 family list then you get an idea of what is in it.
It is called 8864. If 8 Elbows is truly one of the oldest forms then this is it. But I can not find any way to link the two.
This form is also broken up into 3 sections, like some versions of 8 Elbows.
9981
I have an extremely well detailed manuscript which is fascinating as it goes into theory and application of the form. It is mostly a connection of 7 Manuevers of PM and 8 Unyielding(ba gang).
6636-this may be luanjie, but I have no way to link it up also.
This contains all the detailed information on fanche and much was quoted by WHF in his books.
So as far as I know these above 3 forms do not exist anymore. If they do I do not know who has them.
The oldest terminology of PM, regardless of style, exists within;
8 gang-12 rou
7 Long-8 Short
18 Families
8 Strike-8 No strike
The song of connected fist
The song of 7 Manuevers
Dodging deceiving Double Hand Fastening-12 fists
etc.
These are most of the well known old sections.
For the most part they are written in a single unified language as if they are one style.
The odd thing is that style does not follow any modern version of Mantis writing style.
For example 18 families lists 18 techniques or methods.
This is how they are written in old manuscripts of forms. But in later versions the writing style changes completely.
The challenge is further compounded by the wide accaptance of WHF renaming of the names.
So now if you ask which technique is Yellow Dragon Shakes its Tail it is hard to answer as I can(and maybe nobody can) not find the old name in any manuscript of a form that still exists.
In other words, it becomes increasingly difficult to identify which moves of modern forms are from that small group of original forms.
One thing is certain. There were few moves and few forms.
One of the best links can be found in Wah Lum’s Iron Door Bolt(Minus the single finger which likely a modification of double plucking).
This form typifies the type movement and length of a form of old PM.
At least according to these old manuscripts.