C Zeiss Jena Jenoptem / Dekarem 10x50 £9 each. PPI £3.95 for one or two.

C Zeiss Jena Notarem 8x32, 8x40 or 10x40  £39.95 per pair incl postage.

C Zeiss Jena Jenoptem / Deltrintem 8x30 22mm thread. 

Careful as other sizes exist especially 29mm on Japanese models.  £9 each. Plus PPI £3.95 for one or two.