Singlespeed & Fixed Gear - Info on my cranks.

I bought this Paramount track about a month ago, and I'm loving it. Some threads here recently have inspired me to get some additional info on the cranks that are on the bike. I believe they are vintage Dura Ace EX pista cranks. They are 170mm. I thought, however, that the vintage EX were NJS, and I don't see a stamp on these anywhere. Was I misinformed? Any additional info is greatly appreciated!

http://members.cox.net/derekrihc1/bikes/Schwinn2.jpg

http://members.cox.net/derekrihc1/bikes/ParamountCrank.jpg

http://members.cox.net/derekrihc1/bikes/ParamountCranks2.jpg

Yep, those are cranks.

Phew!

different stamp back then.

S/F,
CEYA!

I love that bike. I really, really love that bike.

edit: can we get a shot of the head and seat lugs?

Oh yeah? The only stamp i saw other than the 170 was a stamp with a "Y" and another letter maybe? I don't remember exactly, and it's cold and dark out now :)

Thanks sashae!

I can't seem to find hardly any info on these cranks online, nor can I find a pic/description of an older NJS stamp.

Doh, well since I was counting on CEYA to give me more info, and it appears he's not around anymore, does anyone else know anything about these?

here's a list of shimano date codes http://www.classicrendezvous.com/Japan/Shimano_date_codes.htm

if they do have a 'Y' on them, that would seem to mean they're from 2000, which doesn't seem right.

can we get pics of the stamps?

Weird, they are definitely stamped with a Y and and I (Sept, 2000)

I can't find any info on a reissue though... hmmm..