Never saw an insert glued that way on a watch from any dealers... I have used super glue, but it will fail in time, especially if you shower/bath with it... I have found a replacement for super glue, and use it in all my small jobs (I have about 20 or so reps...) The glue us "G-S HYPO Cement", and can be found at craft stores, or online... I paid uinder 5 USD for my tube... It has a very small applicator... This cement will not glue ones fingers together - I am 66, and a little shaky with these small jobs...
Hope this helps...
Rayman
PS - The cement was developed in 1939 to cement watch crystals...