Skin Diving History

 




















  
 
Early Mfg. & Retailers - Mar-Mac Industries No.2 return to Early Mfg & Retailers - Mar-Mac Industries -





1954 SAFETY FOR SCUBA MAR-MAC CHECK VALVES Convert present breathing hoses to the Non-Return type mouthpiece without alteration or tools. LIGHT WEIGHT-NON-CORROSIVE INCONSPICUOUSLY INSTALLED INSIDE HOSES LOW COST $3.00 PER SET MAR-MAC INDUSTRIES 14S3 REVERE AVE., HAYWARD, CALIFORNIA Self Contained Underwater Breathing 'Apparatus
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