Monocoque? steel atb frame thought might be of interest

[tonyf39]

Not a monocoque in the true sense & not been into mtb not sure if this would be of interest but it's certainly different.
http://cgi.ebay.co.uk/RARE-UNIQUE-MONOC ... keparts_SR

 

[taffy]

What a POS

UNIQUE MONOCOQUE TOP TUBE & DOWN TUBE HI TENSILE STEEL

 

[SeeingisBelievingGTMuseum]

Navy anchor, must weigh an easy 8-10 pounds