Astro-Med Dash II Model MT Two-Channel Chart Recorder, AstroMed DashII

Primeline 6723 Soltec 2 channel chart recorder

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Astro-Med Dash IV Model XL Channel Field Lab Chart Paper Recorder with Printer

Astro-Med Dash IV Portable Data Recorder / Chart Recorder

Astro-Med DASH-2 Portable Chart Recorder w/ Carrying Case – Vintage Medical Lab

Pharmacia Biotech REC 102 Dual Channel Chart Recorder, Gray "T1A"