engraved with "Celestron" and with D=70 m/m f= 600 m/m. The ring on the adjustable objective cell has the Vixen circle V symbol. The lettering is "TRIPLET SEMI-APOCHROMAT" and "D=70 m/m f=600 m/m". There are two mounting blocks on top of the tube, with 1/4-20 threaded holes, and a 6x30 finder mounted on the 1.25" focuser. The tube is white with black wrinkle trim. I believe the vintage is mid 80's. Any info will be appreciated.
