Spanish term
traductora nativa de portugués
Native in: Portuguese 
Works in: Portuguese to Spanish, Spanish to Portuguese
cosía cuchillas
Una épica familia de gángsters ambientada en 1919 en Birmingham, Inglaterra; centrado en una pandilla que cosía cuchillas de afeitar en los picos de sus gorras, y su feroz jefe Tommy Shelby.
PT Brasil
| 4 +2 | costurava lâminas de barbear |
Andrea Pilenso
|
| 4 +1 | costurava |
Yolanda Sánchez
|
| 3 +1 | Cosia navalhas |
Linda Miranda
|
| 4 | costurava barbeadores |
Augusto Rochadel
|
Proposed translations
Brazil
Always in search of the best solution!
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese, and 2 more.
costurava lâminas de barbear
“ A gangue foi nomeada assim após os gangsters costurarem lâminas de barbear em seus chapéus. Tal detalhe se tornaria marca registrada do grupo, que as usaria como armas para cortar suas vítimas”
Portugal
rapidez, eficacia y experiencia
Native in: Spanish (Variant: Standard-Spain) , Portuguese (Variant: European/Portugal)
Works in: Spanish to Portuguese, Portuguese to Spanish
costurava
Portugal
Translator since 2013 /FR, ES, IT >PT-PT
Native in: Portuguese (Variant: European/Portugal)
Works in: French to Portuguese, Italian to Portuguese, Spanish to Portuguese, and 1 more.
Cosia navalhas
Brazil
If professionalism is what you need.
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Spanish to Portuguese
costurava barbeadores
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Note added at 19 mins (2019-12-09 03:55:42 GMT)
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Talvez mais correto seria - Costurava Navalhas. Creio que dada a época, mais provável estar se referindo a navalhas do que a barbeadores.
Discussion
https://www.oxigenio.fm/serie-peaky-blinders/