HELP When to start to fix QBM planar old model?

[Srdjan]

I opened and fix more than 20 QBM this year, but all of them were late models. Now I have two planars from beginning of production of Rollei (one from German and one from Singapore) . So this is my tutorial for repairing later ones http://forum.mflenses.com/carl-zeiss-planar-or-voigtlander-color-ultron-50-1-8-repair-t49749.html where dissembling stars with Spanner Wrench. But the older one don't have holes for Spanner Wrench? Where to start with them?

[Srdjan]

I figure it out it is opened the same way all other QBM lenses, just maybe little bit harder is to unscrew first ring on the beck.