tn hsneewins1
Hollandse cirkel
tn hsneewins2
Zonnering
tn hsneewins3
Zonnering
tn hsneewins5
Compass Dial
tn hsneewins6
Simple Theodolite
tn hsneewins7
Kompass
tn hsneewins09
Hollandse Cirkel
HSNeewins08d
Equinoctiale ring
tn hsneewins10
Kompendium
Delen