Yashica clip on - how to use??

I have a working Yashica clip on meter that i`m gonna use on TLR and rangefinder. Question is- how do i read this one? i am ok with a hand held but this thing has me stumped.
Set ASA- ok
Point to subject - read f-stop/ light value - ok
How do i read shutter speeds?
There is same type on e-bay Australia, title Yashica clip on selenium,
Any directions would be much appreciated thanx

a couple of beers later and i now have it sorted

For future references:
I find that imbibing in a single scotch PRIOR to any advanced photographic endeavor has a tremendous calming effect.
The SECND scotch brings a certain acuteness to the activity
The THIdRs cotch reallllly makes photgphy a whole lotta' fUN!!
By the FORTH drink...I LOVE phtogparhee!!!!!!