thats not the same case so not the right strap
This looks similar, but still not the same shape case
http://www.bidorbuy.co.za/item/35564...NEW_STOCK.html
I would guess that something like this would be correct
http://www.ebay.co.uk/itm/TOP-QUALIT...item35c2ad34d9
Have you emailed the manufacturer to ask if they can confirm the model number and correct strap/bracelet for it? Give the impression you want to buy a replacement from them and then see if you can source one elsewhere
http://www.michelherbelin.co.uk/aftersales/contact.html