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Model 15A1T (3rd pattern)
 m15 |  front |  profile |
|---|---|---|
 valves |  inside |
model 4a1 updated (civil)
 isreali model 4 updated |  front smoother constuction |  full seal rather than chin cup |
|---|---|---|
 simple smoother headharness |
Model 4a1 (civil)
Model 10a1 (child civil)
 model10 child with drining tube |  profile |  Front and sealed filter |
|---|---|---|
 Simple carrier |
Model 4 (simplex copy)
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