an antique polygraph machine with word "polygraph"

antique suitcase old physiology paper opening technology law interrogation invention museum criminal graph science white background identity shape history reliability archival lie detector three dimensional retro style equipment close-up forensic investigation crime laboratory examining analyzing instrument measurement cut antiquities machinery push button taking pulse single word capital letter galvanic skin response psychology case early body squat enforcement polygraph historical ethics antique vintage polygraph lie detector machine word letter device measurement forensic suitcase retro examiners methods float response buttons old physiology psychology rate paper artifacts isolated blood pressure respiration close opening technology law interrogation historical invention museum criminal graph ethics science 3d investigation background identity case early shape rendering history