Rare Byzantine coins in your collection

[kitov]

John Comnenus-Ducas. As emperor of Thessalonica, 1237-1242. Æ Half Tetarteron (1,04 gr.). Thessalonica mint. + Iω Δ/KOMNH/NOC O ΔO/VKAC in four lines / Cross potent on two steps; barred IC-XC across field. DOC 13; SB 2224,CLBC V.Marchev 14.30.3
The coin is minted in 1242-1244 

[Simon]

I have a version of that as well, I was noticing how they differed. Weight is near same but the reverse legend is not the same.  These are found concaved as well. Both yours and mine agree with Hendys observation  that they are tetartera.

https://www.forumancientcoins.com/gallery/displayimage.php?pos=-160043

Here is our coins side by side.

[Pekka K]

I read kitov's  coin: Ιω/ ΔΕCΠ(Ο)/ ΤΗCΚ/ ΟΜΝ

Pekka K

[Paul B11]

I was with my Dad in 1972 in Carthage. He bought a bunch of uncleaned "Roman" coins. I recently "cleaned" enough to identify - some late Roman, some Arab, some Byzantine (all minted in Carthage), some imitations, and a lot of vandal coinage. This little silver coin turned out to be a surprise. SB#872 Heraclius 1/2 Siliqua, Carthage.

Reverse is Her. Const. and Martina, with cross between.

Obverse is Heraclius, looking like Darth Vader here. It was solid smooth black all around when I started.

[Paul B11]

Here is another find. SB276 Justinian I Pentanummium, Carthage. VICTORIA AG ex. CAR - maybe not "rare" but not common. Sorry about condition.

[Paul B11]

John Comnenus-Ducas. As emperor of Thessalonica, 1237-1242. Æ Half Tetarteron (1,04 gr.). Thessalonica mint. + Iω Δ/KOMNH/NOC O ΔO/VKAC in four lines / Cross potent on two steps; barred IC-XC across field. DOC 13; SB 2224,CLBC V.Marchev 14.30.3
The coin is minted in 1242-1244

Kitov, I think you have something different there. Your lettering says John the Despot (Delta Epsilon Lunate-S Pi Tau). then something? My Greek is not so good. John of Thessalonica indeed has the lettering Simon shows and you quote which seems to indicate 'Comenenus' (transliterated) in the second line.

After Nicea took over in 1242, John of Thessalonica was demoted to Despot, no? I think your coin might indicate that (?).

[*Alex]

JUSTINIAN I, AR 250 Nummi, struck 540 - 542 at Ravenna
Obverse: D N IVSTINIANVS P P AVG. Diademed bust of Justinian I, wearing imperial mantle, facing right.
Reverse: Large CN (= 250 Nummi) within wreath.
Diameter: 14mm Weight: 1.07gms Die Axis: 6
SBCV: 313 DOC: 334a

Alex