I have a DC MX900 dated 11-80 is this rare ?

[animal]

I.e. I'm guessing this is a really early caliper ?

I defer 2 ur greater knowledge 

[BMX1973]

Dont think I've seen an MX900 that early 

[animal]

That's what I thought  may be we may get s few expert comments 

[Jaan]

Pretty sure I have a 79, I know I have MX1000's dated 79, need to check the 900's

[MartyC]

I'm no expert but I am pretty certain that if it is stamped it is og, don't forget that would be a manufacturing/production date they may not have gone on sale until '81.  MX1000's were around in 78/79 and am pretty sure MX900's were about shortly after.