@tubetime i think those could be an European (French or German) brand. I don't know the specific name but could be found in many electronic devices (like tvs and such)

@tubetime I'd say Sescosem :

https://how-to.fandom.com/wiki/How_to_identify_integrated_circuit_(chip)_manufacturers_by_their_logos/P-T

@tubetime Sescosem

@tubetime
Sescosem

Sescosem was formed during the merger of Thomson-Brandt and CSF in 1968. Thomson's SESCO division was merged with CSF's COSEM division to form SESCOSEM. Sescosem's products were never a big commercial success, but the technology was eventually absorbed in the subsequent mergers that created STMicroelectronics.

https://how-to.fandom.com/wiki/How_to_identify_integrated_circuit_(chip)_manufacturers_by_their_logos/P-T

@tubetime I have a bunch of these in my parts bin they are quite common in the Netherlands (Europe).

Probably don't exist anymore as I have only ever seen 74LS never any CMOS variants.