A closer look
The sticker tells you the product name and the standard timings. 4-4-3-10 is very good for a DDR2-600 memory kit. Many other manufacturers give you only 5-5-x-x.
Mushkin uses their new heatspreaders which were announced some time last year. They have improved thermal properties.
If you look closely you can see how one side of the module has only white tape and all memory chips are on the other side.
The PCB is made by Brainpower, who are the most popular memory PCB manufacturer.