<https://www.fountainpennetwork.com/forum/topic/232530-kaigelu-316-accidental-disassembly-photos/#comment-3327166>
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"Anyone managed to fit the Jowo/Bock unit in the pen? I would be very interested to hear the results. "
<https://www.fountainpennetwork.com/forum/topic/232530-kaigelu-316-accidental-disassembly-photos/?tab=comments#comment-2522445>