Sailor double knock ID

[Vici81]

Never seen this before, image search has zero matches; can someone please ID it? What would be a fair price for it?

[drifand]

Allen @DarkwingDuck traded one with me. It’s a slimline version of Sailor’s ‘cartridge’ series of MPs. It has a retractable tip; ie not a double knock. The mechanism is pretty delicate and intricate. This one is quite rare and doesn’t show up very often.

[DarkwingDuck]

Scheaffer Ultra Fineline Discovery

Something about this pencil has consumed me in recent weeks. I’ve fallen in love with the 0.5mm black plastic variant and I cannot sing its praises enough. To start, I bought it on a whim because a woman I purchased from on eBay had a collection from her father that she had been selling and didnt quite know how to price them. She sent me a picture of her pile of pencils and to my surprise there were 2 Pilot H-1005 in there, along with many others that stood out and some that didnt stand out as …

[amjacobs7]

Wow. First time seeing top one and the right one. Amazing.

[drifand]

The ‘top one’ is a point-knock ballpoint pen. Works just like the Platinum Bee Line ballpoint. Push the tip in until it clicks to deploy the tip. Push the refill’s TIP down into the paper firmly to click and retract. Fun to fiddle. Hard to repair or refill. The mechanism just doesn’t want to work with the modded refills I made, even if they fit perfectly.