{"id":61610,"date":"2026-03-14T02:35:57","date_gmt":"2026-03-14T01:35:57","guid":{"rendered":"https:\/\/master-watch-parts.com\/product\/zugfeder-aufzugfeder-armbanduhr-taschenuhr-mainspring-140-320mm-uhrenteile-2\/"},"modified":"2026-10-13T10:54:39","modified_gmt":"2026-10-13T08:54:39","slug":"zugfeder-aufzugfeder-armbanduhr-taschenuhr-mainspring-140-320mm-uhrenteile-2","status":"publish","type":"product","link":"https:\/\/master-watch-parts.com\/en\/product\/mainspring-for-wristwatches-and-pocket-watches-1-40-3-20-mm-2\/","title":{"rendered":"Mainspring for Wristwatches and Pocket Watches, 1.40-3.20 mm \u2013 #2"},"content":{"rendered":"<h2>Mainspring for wristwatches or pocket watches<\/h2>\n<p>Mainspring for wristwatches and pocket watches in various sizes from 1.40 to 3.20 mm, brands AMA, STUSA and DYNA, for manual-wind movements.<\/p>\n<p>Spare parts for professionals &amp; watch enthusiasts<\/p>\n<p><strong>Scope of delivery:<\/strong> 1x mainspring, depending on your choice<\/p>\n<p>\u26a0\ufe0f Not suitable for automatic movements<\/p>\n<h3>Manufacturer information:<\/h3>\n<ul>\n<li>\ud83d\udee0\ufe0f <strong>approx. 40% make &#8220;AMA&#8221;:<\/strong> S-shape with riveted, sharpened end piece.<\/li>\n<li>\ud83d\udee0\ufe0f <strong>approx. 40% make &#8220;STUSA &#8211; SWISS&#8221;:<\/strong> S-shape with sharpened hook.<\/li>\n<li>\ud83d\udee0\ufe0f <strong>approx. 20% make &#8220;DYNA&#8221;:<\/strong> S-shape, supplied in an aluminum tray.<\/li>\n<li>\ud83d\udee0\ufe0f <strong>Marking #1 (Eberle):<\/strong> Normal round shape (not S-shape), secured with wire or a red ring, finished with end hook.<\/li>\n<li><strong>\ud83d\udee0\ufe0f #2 Mainspring by DYNA in the aluminum tray:<\/strong> These springs are not ready to install. The diameter must be adjusted manually.<\/li>\n<\/ul>\n<h3>Dimensions &amp; technical notes<\/h3>\n<p>The information in the menu: <strong>Width (mm) &#8211; Diameter (mm) &#8211; Thickness (mm) &#8211; Length (mm)<\/strong><\/p>\n<p><strong>Important for marking #1 (Eberle):<\/strong> The diameter at the end hook can be up to 0.25 mm larger than stated. We re-measured a few as spot checks:<\/p>\n<table>\n<tbody>\n<tr>\n<th>Nominal size (marking #1)<\/th>\n<th>\u00d8 Actual<\/th>\n<th>Nominal size (marking #1)<\/th>\n<th>\u00d8 Actual<\/th>\n<\/tr>\n<tr>\n<td>1.50-10.5-0.115-325<\/td>\n<td><strong>10.65mm<\/strong><\/td>\n<td>1.75x10x0.125&#215;275<\/td>\n<td>matches<\/td>\n<\/tr>\n<tr>\n<td>1.50x11x012x340<\/td>\n<td><strong>11.20mm<\/strong><\/td>\n<td>1.75&#215;10.5&#215;0.115&#215;325<\/td>\n<td><strong>10.7mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.50-11.5-0.13-360<\/td>\n<td><strong>11.70mm<\/strong><\/td>\n<td>1.75x11x0.115&#215;375<\/td>\n<td><strong>11.20mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.60&#215;7.5&#215;0.08&#215;250 #1<\/td>\n<td><strong>7.65mm<\/strong><\/td>\n<td>1.75x11x0.135&#215;305<\/td>\n<td>matches<\/td>\n<\/tr>\n<tr>\n<td>1.60&#215;12.5&#215;0.13&#215;430 #1<\/td>\n<td><strong>12.75mm<\/strong><\/td>\n<td>1.8&#215;7.5&#215;0.085&#215;235<\/td>\n<td><strong>7.65mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.60-15.0-0.16-515 #1<\/td>\n<td><strong>15.10mm<\/strong><\/td>\n<td>1.8&#215;8.5&#215;0.10&#215;270<\/td>\n<td><strong>8.65mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.60-15.5-0.195-425 #1<\/td>\n<td>matches<\/td>\n<td>1.8&#215;8.5&#215;0.11&#215;245<\/td>\n<td><strong>8.70mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.7&#215;11.5&#215;0.13&#215;355<\/td>\n<td><strong>11.70mm<\/strong><\/td>\n<td>1.8x9x0.10<\/td>\n<td>matches<\/td>\n<\/tr>\n<tr>\n<td>1.7&#215;11.5&#215;0.14&#215;330<\/td>\n<td><strong>11.70mm<\/strong><\/td>\n<td>1.8&#215;9.5&#215;0.12&#215;200<\/td>\n<td><strong>9.70mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.7x12x0.15&#215;330<\/td>\n<td><strong>12.20mm<\/strong><\/td>\n<td>1.8x12x0.15&#215;330<\/td>\n<td><strong>12.25mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1.7&#215;13.5&#215;0.17&#215;370<\/td>\n<td>matches<\/td>\n<td>1.8&#215;17.5&#215;0.22&#215;480<\/td>\n<td>matches<\/td>\n<\/tr>\n<tr>\n<td>1.75&#215;7.5&#215;0.095&#215;205<\/td>\n<td><strong>7.6mm<\/strong><\/td>\n<td>1.85x9x0.12&#215;270<\/td>\n<td>matches<\/td>\n<\/tr>\n<tr>\n<td>1.75&#215;9.0x0.10&#215;280<\/td>\n<td><strong>9.15mm<\/strong><\/td>\n<td>&#8211;<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u26a0\ufe0f Note: Typo in the menu at &#8220;17.0&#8221;; the correct value is <strong>1.70 mm width<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Choose a suitable mainspring for wristwatches or pocket watches. Various brands (AMA, STUSA, DYNA) and sizes for manual-wind movements available.<\/p>\n","protected":false},"featured_media":61843,"template":"","meta":[],"product_brand":[],"product_cat":[90],"product_tag":[],"class_list":["post-61610","product","type-product","status-publish","has-post-thumbnail","product_cat-nach-abmessungen","first","instock","taxable","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/product\/61610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/media\/61843"}],"wp:attachment":[{"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/media?parent=61610"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/product_brand?post=61610"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/product_cat?post=61610"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/master-watch-parts.com\/en\/wp-json\/wp\/v2\/product_tag?post=61610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}