Some clearer pic's of the bearing edge might help,that is probably a very early 70's kit,the late 60's early 70's shells were at one point birch and some form of luan,Falkatta was one species used,later 70's and early 80's lower line kits used birch and other woods like camellia.Questlove of the Roots plays a late 60's early 70's kit,even though the wood is mixed species the shells are well made,and from what I understand the drums sound quite good.I personally like the Yammy "tail light" lug,and they used those on the early Recording customs,those kits look very gretschy to me ,the drums had silver sealer paint inside,and the lugs look very similar to the gretsch tail light lugs

Birch/lauan plies and well-made. These are the precursor to the later 7000 series, also wonderful drums.

Thank you! Clapping Happy2

I will post some clearer picture of the edge in a couple of days,

because the drums is not at my home.

At last , here it is. What do you say now ?

thank's everybody!!!

Those are the typical lousy fibrous splintery shells made from any number of poor quality S.E. Asian semi-hard woods of the family Shorea.It's called "Mahogany" in the world of Home Depot but isn't really anything like genuine Mahogany. The Japanese drum factories in the period that these were made, were interested in primarily economy not quality and the choice of wood was more dictated by that factor. That, said----these are a heavy enough ply to withstand falling apart, like most of the 3 ply stuff does, Yamaha, as an established Piano company somewhat knew what they were doing with percussive instruments and I am convinced that with enough work any drum can be made to sound good or even great. These look pretty good. I would definitely try to refine the bearing edges and most importantly choose appropriate heads. The head dominates the sound of the drum and in any kit, each drum demands sometimes a different head on each end.

what heads would you suggest?

Actually Yamaha didn't make them as cheaply as did the other Japanese drum companies at the time, and those are very nice shells. Totally worthy of putting some money into them. Questlove of the Roots plays an original setup of early 70s Yamaha drums just like yours.. They sound great, people can hear them every nice the Jimmy Fallon show is on (although you may not get the Jimmy Fallon show in Serbia!). Remo Ambassadors or an equivalent would make them sing!

So at the end can we say for sure which wood plies are this?

In Serbia it's hard to find somebody who would restore edges at resonable price...

Hey Marko! If they are not too bad, you can get them back in shape with sandpaper. Use progressively finer grit, from 60 or 80 to 100, 150 then finally 200. I can guide you, but really this is for touch ups, not repairing severe damage. If you need help, let me know.