https://ganter.partcommunity.com/3d-cad-models/gn-542-oil-level-sight-glasses-type-a-with-reflector-ganter?info=ganter%2F3_0_maschinenelemente%2F3_5%2Foelschauglaeser%2Fgn542%2Fgn542_a.prj
GN 542 - Oil level sight glasses, type A, with reflector - Ganter
oil level sight glassesgn
https://www.nei.com.au/product/kipp-oil-level-sight-glasses-k0446/
KIPP Oil level sight glasses K0446 | North East Industrial Supplies
oil level sight glassesnorth eastkippindustrialsupplies