Check the listing for details. Vintage Southern Precision Instruments (SPI) Model 1839 Laboratory Microscope. Condition: Used, Made in United States. Listed at 125.00 USD. Model Stamp There is no internal clouding, haze, or glass fungus. The field of view is bright and razor-sharp. The lighting system is fully functional. Both individual light sources have been thoroughly tested, power on instantly, and work perfectly to provide ideal slide illumination.