[speedking1]

Hi all,

I just got a Rolex Speedking and try to become friends with it.
Its stamped serial#: 493550

Crown says: 'Rolex Oyster' with a swiss cross in between.

Couldnt find any information on Rolex serials/manufacturing years online at all.
Can anyone help on dating this watch?

PS.: History of Speedking will also be appreciated apart from the usual goole hits.

Thanks a lot!