Model history for Baader MPCC

[tooth_dr]

I’ve trying work out what model I have, but I can’t find product archive.  I’m getting a bit of CA, and so am wondering could I upgrade my CC?  
Im using it with a 250px and don’t want to alter the focal length.

 

TIA

Adam. 

[tooth_dr]

Mine has the M42 and M48 threads both cast into the holder, the M42 bit doesn’t screw off. 

[Skyline]

A picture would help. 

 

[tooth_dr]

4 hours ago, Skyline said:

A picture would help. 

 

I’ve cut the M42 portion off mine as it was interfering with the prism in a previous oag.   I bought mine in 2007-2009.   It came with this box and ring too.