http://www.ebay.co.uk/itm/G-Shock-GULFMAN-GW-9100-1-ER-rare-Casio-/140658079797?pt=UK_Jewelery_Watches_Watches_MensWatches_GL&hash=item20bfdff835#ht_500wt_1361 A Gulfman without a tidegraph? Cool model either way.