What are the ways to spot fake vintage Montblanc fountain pens?

[bruh.wav]

Recently I got interested in several vintage Montblanc pens from eBay, but it got me thinking, how do I verify its authenticity? I'm quite familiar with the ways to verify the modern Montblanc pens, but I'm not sure I can use the same methods to check the vintage ones. Does the vintage (before 1970s) precious resin have the same colour as the current one? Is there any rule of thumb to check for their authenticity? Thanks in advance.

[AcLondon]

Having bought around fifty vintage Montblanc fountain pens on Ebay since the beginning of the year I'm fairly sure I've never even seen a fake vintage not to mind bought one (I guess we could spend a long time talking about what's meant by vintage - I mean, say, pre-1980).  I've seen plenty of fake modern ones but fake vintages seem rare to me. The modern fakes are overwhelmingly ballpoints/rollerball.  Though modern fake fountain pens certainly exist.

[AcLondon]

1 minute ago, AcLondon said:

Having bought around fifty vintage Montblanc fountain pens on Ebay since the beginning of the year I'm fairly sure I've never even seen a fake vintage not to mind bought one (I guess we could spend a long time talking about what's meant by vintage - I mean, say, pre-1980).  I've seen plenty of fake modern ones but fake vintages seem rare to me. The modern fakes are overwhelmingly ballpoints/rollerball.  Though modern fake fountain pens certainly exist.

Though you might have a special category for incorrect, franken-pens whose parts may not be fake but are a hotch-potch of more than one pen. I avoid these if I can. 

[bruh.wav]

4 hours ago, AcLondon said:

I've seen plenty of fake modern ones but fake vintages seem rare to me. The modern fakes are overwhelmingly ballpoints/rollerball.  Though modern fake fountain pens certainly exist.

 

4 hours ago, AcLondon said:

Though you might have a special category for incorrect, franken-pens whose parts may not be fake but are a hotch-potch of more than one pen. I avoid these if I can. 

Ah okay thanks for the insight. I'll keep that in mind.