Indexing Variations with Shavette Style Blades??

In my learning to use a shavette, it has come to my attention that it's time to start experimenting with different blades then the ones I got with the shavette, So I've started looking for a sampler set. The problem that I'm running into is that my Tondeo shavette seems to have a blade holder that uses very different indexing than those that I see in the sampler sets I had been able to find. My blades have three holes lengthwise on the blade, with the second or middle hole off to one side so the it can only be put into the holder one direction. Are the blades that my razor uses obsolete, or was it only one company that used that particular holder pattern? I'd really like to be able to try out different blades to as if i can shave a little more comfortably. I believe the blades that i was given are 62mm long.

I had a Tondeo razor for a while & I think you will find you are limited to their own manufactured blades .
Maybe another member will be able to tell you if there are any alternative blades available.
Cheers Paul