Anyone with a lot of knowledge about Redline Proline Microlines?

[LIFE OF SCHWINN]

I just picked up an '80 Microline with euro size bottom bracket and no serial number. My friend seems to think it's a prototype for overseas market?
Whatever the case, he said it is very rare (never seen one).
Anyone know the story on this?

 

[OldSkipTooth]

There were some makers that made 3 piece bb frames, as all the rage was alloy 3 piece cranks then, so I don't think it would be any kind of proto type. I have seen cool BMX from Australia with euro bb.

 

[LIFE OF SCHWINN]

That would explain the overseas part, but why no serial #? This is definitely a Redline built frame.
Thanks,
jd

 

[OldSkipTooth]

Yea, no number on a major builder in 1980 is weird, even proto types have some number to for ID.

 

[LIFE OF SCHWINN]

Which leads me to my next question.... has anyone ever seen one of this Redlines with euro BB?
and does anyone know why this doesn't have a serial #?
I'm the 5th owner. 2nd owner picked it up from original owner at a show (probably Rockford). Parts hung on it have gone through many configurations...

 

[100bikes]

Our store sold a few of these in the day.

Lightweight, good quality and modest price for a race quality bicycle.

Seattle Bike Supply (SBS) was the vendor.

Although a bit unusual, this was a production frame, and complete bike.

Will try to find catalogue and pricing info.