This is very nice example of the cooperation by Certina and Rado. Crystal is Saphire and it has a pyramid grind. This watch is very big and it looks very modern. All parts are original and authentic, same as bracelet. This is the same model of the watch which got Muhamed Ali - Tiger-Eye stone dial. Vintage CERTINAs ¦ DS Diamaster Rado)!!! My watchmaker said the watch is in great overall conditon but he didn't make preasure test so I don't ensure it still keeps good WR. Information for those who don't know to much about vintage watches: I don't recomend put the watch under water. This is probably most wanted Certina watch ever. In 1975 Certina presented the Diamaster. The special feature was the scratchproof sapphire glass and the tungsten carbide case, which came from Rado. Rado itself used this cas for the Diastar models. To produce the case, first tungsten- and titan carbide with cobalt- or nickel powder were pulverized, the mixture pressed and presintered at a temperature of 1'000°C. Then the blank were moulded into the final shape and finally sintered at 1'400°C. Thereby the case volume shrank by 30%, which gave the alloy its high hardness of 8,5 Mohs. Finally the case were grinded and polished with diamond. —// SHIPPING METHOD //— SERVICED BY: FedEx and UPS. Express ship —[[[ NOTES TO CUSTOMERS ]]]— [PHOTOS] - All photos are not retouched (except for serial numbers hidden for security reason). Any defects not mentioned in the description but visible in the pictures will be considered as described. Pictures speak a thousand words, so we kindly ask you to look at the pictures carefully before bidding as they form an integral part of the description. I value my relation with customers so I do not want to become your disappointment when items is received with undesirable results. [ACCURACY] - Accuracy is tested on every watch at horizontal position (dial face up) at fully wounded power reserve and is deemed satisfactory for keeping time before sending out of our shop. Some factors which might affect accuracy include length of time worn on the wrist, arm movement, and tension on the power spring. Watches that are more than 10 years old might experience a larger accuracy variance and inconsistency because of mechanical wear. [AUTHENTICITY] - All watches I sold are authentic. I try to label all aftermarket parts which I can identify and at the best of my knowledge. Please evaluate the item accordingly to the pictures as they are taken from the actual item you will be receiving. Written description is only for auxiliary purpose when pictures cannot show the defect perfectly. (except for some Brand new items where pictures might be borrowed from previous listings). [CANCELLATION AND RETURN] - If the winning bidder or buyer decides to cancel / withdraw the bid or the shipment is being returned at the false of the buyer (e.g. unable to process duty payment in a timely manner, delivery refusal, etc.) there is a risk for the buyer to cover the cost of all shipping charges and return import duties of seller. [IMPORT] -Please note we cannot guarantee that you will or will not be charged any customs tax or duties. Import laws are different in every country and information can be found in the local customs office webpage. Any customs or import duties are charged once the parcel reaches its destination country and must be paid by the consignee. [DAMAGE OR LOST PARCEL] - We try to check carefully every watch before shipment as carefully as possible but in the unpleasant event that the parcel or the watch arrive damaged or lost, please let us know and keep all the packaging materials and contents in place so we can file a claim with the courier for you.