Concord blades - has anyone tried them?

[NotTheStig]

I haven't found anything here or on another shaving forum of which I am not a member about these blades (only the namesake razor).
Tempted to get a pack to try but with postage comes to about £3.75, which is a lot for 10 blades - especially if I throw 9 in the bin

 

[NotTheStig]

Same question for SEKICH, which look like vintage blades to me.
Both blades in one seller's store on ebay; think it's fine to post link? I'm not affiliated in any way with seller.

<!-- m --><a class="postlink" href="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280492304689&ssPageName=STRK:MEWAX:IT" onclick="window.open(this.href);return false;">http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT</a><!-- m -->

<!-- m --><a class="postlink" href="http://cgi.ebay.co.uk/10-Rare-SEKICH-Blades-FITS-Gillette-Merkur-Feather-/270688805741?pt=LH_DefaultDomain_0&hash=item3f064f636d" onclick="window.open(this.href);return false;">http://cgi.ebay.co.uk/10-Rare-SEKICH-Bl ... 3f064f636d</a><!-- m -->

Apologies if I should not have done this; just trying to find info and opinions on them. Nothing found at all so far.

 

[antdad]

If they are made in Turkey I'd guess they are probably a Derby derivative if not the same.

 

[NotTheStig]

Thanks. They are sold from Turkey and have the same list of coatings as Derbies.
I may order a pack one day. Maybe a domestic market brand?