I had the same thing on a DSOTM over Christmas.
I replied asking what the hell which went unanswered and 3 weeks later had an offer from them by which time it had sold on SC.Thank you for your enquiry to sell your watch.
Please can you confirm whether you have the original receipt for your watch or whether this could be obtained from the place of purchase.
If you are unable to do so, please can you provide more information on where the watch was purchased.
We look forward to receiving your response at your earliest convenience, upon receipt of this information we will be in contact as soon as possible.