Help Identify of this medal

Hi All
I have a medal (probably gold plated)..apparently from (or related to )the Dutch swimming federation founded in 1888 ...however I could not find anything about the medal or medals this federation issues..
Any help is appreciated to identify the medal..
Find attached pics of front and back..I have captured the back nicely...the front just
says "Koninklijke Nederlandse Zwembond " and " opgerichit 14 Augustus 1888"
In the inside the coat of arms of the lions it says " JE MAINTIENDRAI"...
Thanks in advance!
TTA

 

Also the VR.SLD. inscription at the back...what does it mean?
TTA

 

Koninklijke Nederlandse Zwembond I'm guessing loosely translates as Royal Netherlands Swimming Federation.

 

Thanks...yeah.that is correct...but couldn't find any info of the medals they issued so that I could assess my medal...
TTA

 

Opgericht = founded

N.K. 1976 = Nederlands Kampioenschap 1976
= Dutch championship 1976

EST. 4 x 100 M VL.SL. D. = Estafette 4 x 100 meter Vlinderslag Dames.
= Relay Butterfly stroke Ladies

1e PR = 1 ste prijs
= First price

"Je Maintiendrai"
Coat of arms of the Netherlands

That should make things clear.

 

Thanks a lot Run Tin Tin....though it beats me how a Dutch 1976 championship medal got here where I live..
TTA