Diana Diana, FWB, Anschutz seals

[specie]

The original breech/piston buffer/seals used on the FWB 120 series and 10M guns, on the Anschutz springer 10M guns, (and maybe also on the Diana) was a yellow-white material that degrades with time.

The modern materials used on FWB and Anschutz are colored, red, blue, or green depending of when made, and maybe are long-lasting/almost eternal?
Are the modern seals for the Diana the same material, and if the D75 is rebuilt in recent years can it be expected to be the last time it will need to be done?
Does Umarex, Dave Slade, Motörhead, others rebuilding these guns ONLY use the modern composition seal material?

Incidentally, the degradation of seals on FWB just means the loss of power/seal blowing out the barrel/poor piston buffer function. On the Anschutz 250, it means the gun pretty quickly self-destructs.
What happens to a Diana with old seals?

 

[marflow 777]

material used would be a hard fact to find out
FWB start with a cream or white to light blue to dark blue to green and now i have seen red
the material is unknown but it seems the FWB material had a larger life span and of course they have and easier life as buffers
the Diana seal for the pistols and Giss system guns if they came out of Germany are blue they fit without sizing and i would say they are good for 25 years the rear seal or what ever you want to call it are of clearish material and in the 7 model 6 pistols i have done the rear seal show little degradation while the front is a crumbly mess
now the front seal for the Diana 75 could be red they showed up some years back but i do not concider them factory seals but the material would be of good quality
the bottom line is any seals use to rebuild a D75 will last a very long time
as a home rebuilder i would use blue seals in a Diana and there is two reasons
first the seals are an SOB to get on the pistons so taking them off is not going to happen
two the geared pistons have no way to turn them besides by hand and that my friend so not a job you want to add to your rebuild

 

[Ievgen721]

The original Diana seals are blue,the OEM sealing washers for the Giss filler are coffee-colored and made of rubber or something similar, the FWB OEM seals are green, this is what we have today. You should not buy the red seals, they are not original and they do not correspond to the sizes, it is unknown what they are made of.You need to be careful, the seals Polish production are the same green color as the OEM FWB.I bought the original Diana seals on eBay in France, the original FWB seals I bought on eBay in Canada. I bought the original washers for GISS filler in PA.

 

[marflow 777]

Giss System Stuff if you are at long enough you will collect stuff