Model family · Martin Yale
Martin Yale PostMark 30 family: 3 variants compared
Martin Yale PostMark 3056, Martin Yale PostMark 3068, Martin Yale PostMark 3078 are sold as closely related variants. Their spec sheets share most details, so we list them side by side here. Rows highlighted below are where the sourced specifications differ: Speed, Daily volume, Screen.
Specifications by variant
| Spec | Martin Yale PostMark 3056 | Martin Yale PostMark 3068 | Martin Yale PostMark 3078 |
|---|---|---|---|
| Model | PostMark 3056 | PostMark 3068 | PostMark 3078 |
| Type | Automatic letter opener (milling cutter) | Automatic letter opener (milling cutter) | Automatic letter opener (milling cutter) |
| Cutting method | Milling cutter; depth of cut 0.7 mm (factory set), 0-3 mm (tool adjust) | Milling cutter; depth of cut 0.7 mm (factory set), 0-3 mm (tool adjust) | Milling cutter; depth of cut 0.7 mm (factory set), 0-3 mm (tool adjust) |
| Speed | 8,000 envelopes per hour (production); 24,000 per hour (theoretical) | 14,000 envelopes per hour (production); 32,000 per hour (theoretical) | 20,000 envelopes per hour (production); 36,000 per hour (theoretical) |
| Daily volume | Up to 20,000 filled envelopes | Up to 40,000 filled envelopes | Up to 60,000 filled envelopes |
| Feed | Hopper capacity 300; feeder capacity 100 envelopes; mixed-thickness separator | Hopper capacity 300; feeder capacity 100 envelopes; mixed-thickness separator | Hopper capacity 300; feeder capacity 100 envelopes; mixed-thickness separator |
| Maximum envelope length | 13" (330 mm) | 13" (330 mm) | 13" (330 mm) |
| Maximum thickness | .25" (6 mm) auto feed; .39" (10 mm) manual feed | .25" (6 mm) auto feed; .39" (10 mm) manual feed | .25" (6 mm) auto feed; .39" (10 mm) manual feed |
| Screen | n/a | 3.8" (96.52 mm) touch screen | 3.8" (96.52 mm) touch screen |
Values are copied from each variant's sourced spec page. “n/a” or “not stated” means the source didn't state it; we don't estimate.
How to choose between them
Start with the highlighted rows. If they don't matter for how you'll use the machine, the variants are interchangeable on paper, and availability can decide. Each variant's own page keeps its sources, supplies and track record.
Where to buy each variant
We list a retailer only after confirming it sells the exact model. Amazon links are affiliate links. We don't show prices.