Question 1

Which Marathon should I buy first?

Accepted Answer

For most buyers the 41mm GSAR automatic is the logical start. One watch covers daily and field duty, the Sellita SW200-1 calibre can be serviced anywhere, and at 300 metres of water resistance it is a plain but fully capable military diver. Expect roughly £1,530 on sale against a £1,700 list.

Question 2

What is the difference between Marathon's quartz and automatic models?

Accepted Answer

The same model name can ship automatic or quartz, so check the movement before buying. GSAR and MSAR use the automatic Sellita; TSAR, JSAR and the quartz Navigator use ETA, while the anthracite US 250 Navigator is automatic. Quartz versions are the more practical daily carry, the automatics more satisfying for a collector.

Question 3

Is the tritium in Marathon watches dangerous, and how long does it last?

Accepted Answer

Tritium gas tubes are safe and glow constantly for years with no charging. The H3 tubes slowly dim over time but realistically last well beyond a decade. The MaraGlo paint on the bezel charges like conventional photoluminescent lume. Together they give clear low-light legibility for genuine field use.

Question 4

Is Marathon expensive to service?

Accepted Answer

No, and this is one of Marathon's real strengths. The Sellita, ETA and Seiko calibres it uses can be serviced by any competent watchmaker worldwide, with parts that are widely available. Maintenance is meaningfully cheaper and easier than on brands using in-house movements, keeping long-term ownership costs low.

Question 5

Does Marathon hold its value on the secondary market?

Accepted Answer

Marathon holds value sensibly, with the steel GSAR and limited editions being the steadiest. But the appeal is not speculative gain; it is balanced retail pricing, genuine durability and easy serviceability. Buy a Marathon to wear and use it hard, not as an investment piece.