Early 20th century German air pistols

Early 20th century German air pistols 

With thanks to a collector friend for these pics.

They are (from top left in top pic):

Tell model 1

Diana model 8 (sold in UK as 'Holborn')

Eisenwerke Gaggenau 'MF'

Mayer & Grammelspacher 'MGR'

More pics of this Tell here:

https://forum.vintageairgunsgallery.com/tell/tell-model-1/#post-394

the Diana model 8 here:

https://forum.vintageairgunsgallery.com/vintage-diana-air-pistols/diana-model-8/#post-3966

and the MGR here:

https://forum.vintageairgunsgallery.com/vintage-diana-air-pistols/diana-mgr/#post-3967