Stand Ia with curved base - circa 1899
The graceful lines of this
modified English base was introduced by Leitz towards the end of the 19th
century. Continental models
could be order with the curved base or the standard horseshoe.
This instrument is the larger version of this model and is signed
on the base, “E. Leitz Wetzler, 48707.”
The serial number would tend to date it circa 1899. Coarse focus is rack and pinion, fine focus with a micrometer
knob. The three original
Leitz lenses are a 3, a 7, and a 1/12 oil immersion.
The rotating circular slide stage has minute mechanical
adjustment by two thumbscrews on either side.
Beneath the stage is an Abbe condenser with variable diaphragm
and swing out filter holder. The
condenser is the more sophisticated type with moveable iris for oblique
illumination and an additional upper variable iris diaphragm for
addition control of the light. The
eyepiece is a number 3. The
plano concave mirror is in very good condition, noting some small age
spots on the plane side and some edge separation on the concave side.
The original mahogany case has a matching serial number, and one
(of originally two) slide out lens blocks, and an accessory drawer with
two original filters – a blue, and a frosted.
The microscope is finished in lacquered brass with a painted
black base. The lacquer
coverage is complete and in excellent condition with only minor wear.
The base shows minor use wear from handling. This is a fine example of the less common Leitz continental
microscope with curved base. It
is in excellent usable condition, perfect for someone seeking a
delicate, working rare version of the popular continental style.