Had the "Merkur" Tuna on all week here in La Laguna Tenerife,coped well in the swimming pool,set the time via atomic clock last Sunday and checked now against same....5 secs slow,now that aint bad for a watch costing much more let alone the £132 I paid.

Very happy with it so far,BUT lets see how the stainless steel case sapphire crystal and ceramic bezel cope under the hardship of life on the wrist over time,because someone I think mentioned it may not do well over time,even the Seiko movement might not last hey!!!!!.

Just an honest opinion thus far,no more or less,if/when it succumbs to anything terrible due to anything otherthan normal wear n tear Ill be sure to slate it on here......