Rotring 600 Transitional/levenger Nib Swap

[MichaelBradyNet]

I finally purchased a Rotring 600, it is a levenger branded model that falls into the transition between series 1 and 2. It has knurling and cap retention springs. It is currently fitted with a Fine nib and I would like to swap in an Extra Fine nib. I've found other posts describing models that fit each revision but I haven't come across anything specifically about he transitional model. Will the nib from the Artpen EF sketching model fit (is this a normal EF nib)? I've also seen Esprit nibs listed on Ebay German, would those work? Thanks for your time.

[MichaelBradyNet]

Well the pen arrived an it actually appears to be one of the later Leveneger branded 600s that were made in Japan. Hopefully the Artpen EF nib will work in it.

[MichaelBradyNet]

The artpen sketch EF arrived, the nib looks less rounded than the Japanese 600 nib and seems to produce a thicker line. The artpen also seems scratchier, I guess I’ll stick with the fine nib it came with.