Marin seat post size?

[hamster]

viewtopic.php?f=1&t=37430
Looks like yours has the BV serial number, I agree.
Some of the SE's certainly were simply painted up Eldridges on the thread above.

 

[spitball]

I've literally just been reading that and now have brain fade, I'm pretty sure it's just a BV, it's a leave any where bike so it will do as is

The Muirwoods I have is black or zolatone with green forks and handle bar stem with green handlebars, so I assume it is what it says on the sticker and the frame number is M61

 

[hamster]

If it's Zolatone with writing in green the indeed it's 1991. If white it's 1990.

 

[spitball]

If it's Zolatone with writing in green the indeed it's 1991. If white it's 1990.

Yep green writing with a GS 200 group as per brochure all I need is a front Araya MP22 wheel and it's back normalish