|
|
|
"Microscope"
Alf Stevens
 |
|
|
|
|
|
|
|
|
|
|
A centring microscope designed and built by Alf Stevens
|
|
|
|
|
|
|
|
"Microscope"
Alf Stevens
|
|
|
|
|
|
|
|
|
|
|
A centring microscope designed and built by Alf Stevens
|
|
|
|