Its very hard to know which ladder it could be there are hundreds of types and many companies making them. However
you can narrow things down - are there any masters or phd theses around? These are detailed and contain all products used.
What about papers/publications from the lab - these should have markers listed.
Also a good thing is usually the 10kb markers are quite similar - so if you have a known band you should be able to figure out others or if its the right one
To me it seems its a 10kb ladder as Butters mentioned. The bottom gel last lane is either degraded dna/plasmid or primer dimers and the other lanes seem to be either plasmid or genomic DNA.
Judging by the gel percent, its not genomic and its more like 10kb ladder and plasmid but finding out what you ran in your lanes, and looking at the publications/theses I think you will find out